PSCS Wiki

VPOP3 re-downloading old messages from the ISP POP3 server

Anonymous (anonymous@undisclosed.example.com) — 2026-01-05T09:31:47+00:00

VPOP3 re-downloading old messages from the ISP POP3 server If you tell VPOP3's POP3 mail collector to leave messages on the ISP's server for a few days, you may find that sometimes VPOP3 will redownload all the messages from the ISP mailbox again.

How to Backup VPOP3

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to Backup VPOP3 By default VPOP3 v3 and later will automatically perform a daily backup of the database into a file called DBBACK-x.DMP, where the backup file rotates on a weekly basis (DBBACK-0.DMP is Sunday's backup, DBBACK-1.DMP is Monday's backup, etc).

German Webmail Language Page

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

German Webmail Language Page Copy/paste the text below to a file 'german.lng' in the VPOP3 directory. (German users, feel free to update/correct the text below) #login page logintitle=VPOP3 Login webadminlogin=web admin login webmaillogin=Webmail Anmeldung enterusername=Sie müssen einen Benutzernamen angeben bookmarksnotsupported=I'm sorry, but your web browser does not support this function. You will have to add this page to your bookmarks manually. loginfailed=Anmeldung fehlgeschlagen …

How to make VPOP3 re-download POP3 messages from the ISP

Anonymous (anonymous@undisclosed.example.com) — 2026-04-06T17:57:00+00:00

How to make VPOP3 re-download POP3 messages from the ISP If you have the VPOP3 Mail Collector setting Leave Mail On Server enabled, then VPOP3 will leave your messages on the ISP POP3 server for the specified number of days after downloading it. If, during this time, you want to make VPOP3 download those messages again, then you can do so.

Move VPOP3 Version 5 (or later) to a new PC

Anonymous (anonymous@undisclosed.example.com) — 2026-04-21T11:12:40+00:00

Move VPOP3 Version 5 (or later) to a new PC Moving VPOP3 Version 5 or later to a new PC is slightly different from moving earlier versions, because of the database system, which was introduced for version 3 and modified for version 5. The summary of steps is: * Stop VPOP3 on the original PC

French Webmail Language File

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

French Webmail Language File Copy/paste the text below to a file 'french.lng' or 'francais.lng' in the VPOP3 directory. (French users, feel free to update/correct the text below) #login page logintitle=VPOP3 Login webadminlogin=web admin login webmaillogin=web mail login enterusername=You must specify your VPOP3 username here bookmarksnotsupported=I'm sorry, but your web browser does not support this function. You will have to add this page to your bookmarks manually. loginfailed=Login Faile…

Seeing where a message came from

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Seeing where a message came from Sometimes you need to check to see where a message really came from. The 'From:' email address is easily forged, so that cannot be relied upon. The first thing you have to do is to get the full message headers. These may look daunting, but are very useful for problem diagnosis.

-ERR Mailbox Locked error

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

-ERR Mailbox Locked error If your email client displays an '-ERR Mailbox Locked' or '-ERR [IN-USE] Mailbox Locked' error when trying to log into VPOP3 it means that the mailbox is locked. The POP3 standard requires that POP3 mailboxes have an 'exclusive lock' on them when they are in use. This means that only one POP3 client can access the mailbox at once. Also, if a POP3 mailbox is currently accessing a mailbox, then no IMAP4, Webmail or administrator access is allowed to the mailbox at the s…

Setting up VPOP3 to work with Exchange 2003

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Setting up VPOP3 to work with Exchange 2003 The instructions below are for Exchange Server 2003. For other versions of Exchange see here. You can link VPOP3 to Exchange Server, so that Exchange Server sends outgoing mail through VPOP3 and VPOP3 sends any incoming mail directly to Exchange Server.

Move VPOP3 Version 3 or 4 to a new PC

Anonymous (anonymous@undisclosed.example.com) — 2019-11-12T16:09:08+00:00

Move VPOP3 Version 3 or 4 to a new PC Moving VPOP3 Version 3 or 4 to a new PC is slightly different from moving earlier versions, because of the database system. The summary of steps is: * Stop VPOP3 on the original PC * Manually make a backup of the database on the original PC

Accepting Incoming SMTP through a router

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Accepting Incoming SMTP through a router If your ISP is providing you with an SMTP mail feed (incoming SMTP) and you have VPOP3 connecting to the ISP through a router then you will probably need to modify the router configuration to allow this. Most routers' default configuration will only allow outbound connections (ie connections from the local network out to the Internet). If you need to accept incoming SMTP mail, then you need to tell the router to allow inbound connections on port 25 for …

Exchange 2007

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Exchange 2007 You can link VPOP3 to Exchange Server, so that Exchange Server sends outgoing mail through VPOP3 and VPOP3 sends any incoming mail directly to Exchange Server. You should first of all set up VPOP3 to send and receive Internet email as normal.

Backscatter

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Backscatter In email, “backscatter” is the term used if you send bounce messages back to spam messages. As most spam messages use forged email addresses, then the bounce messages will go to an innocent person, who will find them very annoying. Stopping VPOP3 from sending Backscatter

How to create an SSL Certificate

Anonymous (anonymous@undisclosed.example.com) — 2026-03-23T10:18:43+00:00

How to create an SSL Certificate VPOP3 Enterprise supports SSL certificates for encrypted sessions. The basic mechanism to create an SSL certificate is that you have to generate a CSR (Certificate Signing Request) then send that to a CA (Certificate Authority) who will sign your certificate and give you the certificate back.

Incoming SMTP Feed

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Incoming SMTP Feed An incoming SMTP feed is where incoming mail is sent directly to your mail server without going through your ISP's POP3 mail server on the way. Advantages An incoming SMTP feed has several advantages over going via a POP3 mailbox:

Mail Not Downloading From ISP

Anonymous (anonymous@undisclosed.example.com) — 2026-04-06T17:59:47+00:00

Mail Not Downloading From ISP This normally happens because you have told VPOP3 to Leave Messages On Server (on the Mail Connectors -> Mail Collectors -> (name) -> POP3 General tab). If you do this, VPOP3 will leave messages on the ISP's mail server for several days, and remember that it has already downloaded them. Then, the next time it connects it will see that there are some messages waiting, but it may find that it has already downloaded them, so it won't download them again.

Spam filter not working

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Spam filter not working If the VPOP3 spam filter appears not to be working at all, the first thing to do is to look at the message headers of an incoming message to see if the spam filter is being run at all. Check to see if a header line beginning with X-VPOP3-Spam

550 5.7.1 Relaying not allowed! Bad sender IP address

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

550 5.7.1 Relaying not allowed! Bad sender IP address This SMTP error message means that the computer which is sending the message is not permitted to send outgoing messages based on the VPOP3 SMTP Service's Access Restrictions. This is probably because someone is trying to send messages from outside your local network, and you have not configured VPOP3 to allow this. You have to be careful when allowing this, because you may configure VPOP3 to be an open-relay, which is a

VPOP3 Webmail/admin service and/or Status service is not listening on correct IP addresses or ports

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

VPOP3 Webmail/admin service and/or Status service is not listening on correct IP addresses or ports Sometimes, VPOP3 can be configured so that the Webmail/admin service, or Status service is not listening on the correct IP addresses or ports. This can be hard to fix through normal methods, since you may not be able to get into the settings to change the settings.

Creating Extra SMTP Services

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Creating Extra SMTP Services In VPOP3 Enterprise (not VPOP3 Basic) you can create multiple SMTP services. This can be useful if you want VPOP3 to listen on different ports and/or have different settings. There are two ways of doing this. Have a single SMTP service listening on multiple ports or IP addresses

Delete OutQueue messages directly from the database

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Delete OutQueue messages directly from the database If there is an extremely large number of messages (eg hundreds of thousands) in the VPOP3 OutQueue, then it may take a very long time for VPOP3 v5 and later to start as it check the message database tables for consistency during initialisation.

Initial Configuration Tasks

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Initial Configuration Tasks After installing VPOP3, you will need to get into the VPOP3 settings. The easiest way of doing this is to find the VPOP3 Status Monitor in the Windows task tray. Right-click this icon, and choose 'VPOP3 Settings'. (If that doesn't work, see this article to troubleshoot Status Monitor problems). Alternatively, on the VPOP3 PC, you can go to Start

Handling mail for multiple incoming domains

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Handling mail for multiple incoming domains VPOP3 can easily handle mail for several incoming domains. Exactly how you do it depends on the exact situation. All domains are 'aliases' If the domains are aliases of each other, for instance, you have 'mycompany.com' and 'mycompany.org', both of which are the same, so each address at mycompany.com also exists at mycompany.org, and the emails go to the same people regardless of which domain is used, then you simply configure the domains in the ma…

Performance Requirements

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Performance Requirements The performance requirements for VPOP3 depends on many factors, so we can't give specific details for any scenario. How to detect limiting factors * Use the Windows Performance Monitor (perfmon.msc) * Add counters for:

PostgreSQL Replication

Anonymous (anonymous@undisclosed.example.com) — 2019-02-06T17:10:31+00:00

PostgreSQL Replication PostgreSQL 9.1 (used in VPOP3 5 and later) supports replication from a 'Master' to a 'Slave' database server. This can be used with VPOP3 for having a near-realtime backup of your settings & messages. To use the replication, you need to have a file share which is accessible from both PCs. The thing to watch out for is that the PostgreSQL services may be running as a different user from the currently logged in user, so make sure that the user(s) which the PostgreSQL servi…

Sender Policy Framework / SPF

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Sender Policy Framework / SPF SPF is a system used to tell mail servers which IP addresses can send mail from which domains. It is designed to reduce 'spoofing' of email addresses. For instance, if you receive an email message from your bank, your mail software can check that it came from an IP address authorised to send mail from your bank, and treat the message with suspicion if it didn't come from an authorised IP address.

Spanish Webmail Language File

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Spanish Webmail Language File Copy/paste the text below to a file 'spanish.lng' or 'espanol.lng' in the VPOP3 directory. (Spanish users, feel free to update/correct the text below) #login page logintitle=VPOP3 Login webadminlogin=web admin login webmaillogin=web mail login enterusername=Especificar aca el usuario de Correo bookmarksnotsupported=Disculpe, pero su navegador no soporta esta funcion. loginfailed=Login Fallido - Favor reintente nuevamente invalidlogin=Detalles del login inválidos…

How to move the VPOP3 Message Store to a new PC

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to move the VPOP3 Message Store to a new PC Use this option if you want to have VPOP3 running on one PC, but have the message store database on another PC. Manually Install PostgreSQL on the new PC Download the 'pgInstaller' version of PostgreSQL from the

Socket Error 10055 - No Buffer Space Available

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Socket Error 10055 - No Buffer Space Available Error 10055 means that Windows has run out of TCP/IP socket buffers because too many connections are open at once. Things to check if this happens are: * Is there any other TCP/IP software running on the same PC as VPOP3 - eg a proxy server

Configure SRS

Anonymous (anonymous@undisclosed.example.com) — 2025-08-18T15:28:11+00:00

Configure SRS In VPOP3 8.8 and later, you can use Lua scripting to implement 'SRS' (Sender Rewriting Scheme') in VPOP3 This involves adding a couple of functions to rewrite outgoing return paths in 'relayout.lua' or 'mxout.lua' as appropriate and a couple of functions to redirect rewritten bounce message recipients in 'smtpsvr.lua'

Copy Outgoing mail

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Copy Outgoing mail Sometimes people need to copy outgoing mail for various reasons. There are several ways of doing this in VPOP3 depending on your exact requirements: * Message Monitoring - this copies all outgoing, incoming and/or internal mail sent by/to specific users to another specific user

Database Maintenance

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Database Maintenance VPOP3 uses the PostgreSQL database server for most of its data storage. Normally this will not require any special maintenance, because it will manage itself. To do any special database maintenance you will need to close down VPOP3 first, because PostgreSQL needs exclusive access to the database to perform any operations such as decreasing the size of database files. Note that these operations may take some time! There are some PostgreSQL utility programs in the VPOP3\pgs…

How to Install VPOP3

Anonymous (anonymous@undisclosed.example.com) — 2021-03-08T10:48:40+00:00

How to Install VPOP3 Simply download VPOP3 from the website, and run the installation program and follow the prompts. Occasionally people may have problems with the PostgreSQL part of the installation. If that happens, please contact us either by email at support@pscs.co.uk or by phone to +44 (0)1484 855800, and we will do our best to help.

We installed a new router and now nothing works

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

We installed a new router and now nothing works If you installed a new router on your network and left it at the default settings, you may find that VPOP3 doesn't seem to work afterwards. This is because it may be that the new router allocates new IP addresses on your network.

Make VPOP3 retry outgoing messages immediately

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Make VPOP3 retry outgoing messages immediately If VPOP3 has a temporary problem sending a message it will retry it later. When it will retry it depends on how many times it has already tried to send it, and is based on the 'Sender Retry' setting in the Mail Connectors

PostgreSQL server won't start due to damaged log files

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

PostgreSQL server won't start due to damaged log files If the PostgreSQL server won't start at all, because its transaction logs are damaged, you will probably need to recreate the database store totally. To rebuild the database: * Open a command prompt and find the VPOP\pgsql folder

Recovering messages from corrupted database into fresh database

Anonymous (anonymous@undisclosed.example.com) — 2025-09-11T13:48:07+00:00

Recovering messages from corrupted database into fresh database If the VPOP3 message database is corrupted, then one option is to build a fresh database and restore the settings into it, then recover the messages from the old database using the 'Message Restore' function in VPOP3. This has minimal downtime, but old messages will not all be available until the restore has completed. New messages will be available quickly, and you will be able to send messages.

How to remove messages from the outbound queue

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to remove messages from the outbound queue To delete messages from the VPOP3 'OutQueue': * log into the VPOP3 settings * go to the Users page * click on the OutQueue entry in the accounts list. This will show you a list of all the messages waiting to be sent by VPOP3

Repairing corrupted database

Anonymous (anonymous@undisclosed.example.com) — 2024-01-15T11:35:45+00:00

Repairing corrupted database With PostgreSQL (as with most high-end databases) the database system will automatically recover after power failures etc, if it can. If it can't then there is no manual 'repair' function, because the data cannot totally be recovered (or it would automatically have been recovered).

Setup steps for multiple POP3 accounts at the ISP

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Setup steps for multiple POP3 accounts at the ISP * Set up all the local users you need in the 'Users' page in the VPOP3 settings. The usernames & passwords do not have to have any relation to the ISP's accounts. These are the details which the users will put in their email clients (eg Outlook) to collect their mail from VPOP3.

"Too many logins" error message

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

"Too many logins" error message VPOP3 version 4 and later have a limit on the number of concurrent logins which can be received for a single user or from a single IP address. This is to prevent a single user from bringing the server down. The current default limits are 20 per user, or 1000 per IP address (to allow multiple people sharing a NAT IP address)

How To Upgrade VPOP3 to version 5 or later

Anonymous (anonymous@undisclosed.example.com) — 2019-11-08T15:37:52+00:00

How To Upgrade VPOP3 to version 5 or later Upgrading VPOP3 is usually a straightforward process. Download VPOP3 from our web site and back up your current installation just in case something goes wrong. Then simply run the installer that you downloaded and install it over the top of your existing VPOP3. All your settings and mail will be preserved.

How to use the VPOP3 Status Monitor

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to use the VPOP3 Status Monitor The VPOP3 Status Monitor is a small program which displays a postbox icon (usually red) in the Windows notification area (usually at the bottom right of the screen - by the clock). This icon can be used for quick access to various VPOP3 facilities. Note that the Status Monitor is

v3/4 - Move the message store to a new folder/drive

Anonymous (anonymous@undisclosed.example.com) — 2018-12-05T15:25:24+00:00

v3/4 - Move the message store to a new folder/drive This guide assumes you want to just move the VPOP3 message store/database to a new folder on the same PC, and leave the VPOP3 installation directory where it is. * Stop VPOP3 * Stop PostgreSQL

How to move VPOP3 V3 to a new folder

Anonymous (anonymous@undisclosed.example.com) — 2018-12-05T15:25:41+00:00

How to move VPOP3 V3 to a new folder This guide assumes you want to move the whole of VPOP3 (including the message store) to a new folder on the same PC * Stop VPOP3 * Stop PostgreSQL * Remove the PostgreSQL service * Move VPOP3 to the new folder

v5 - Move the message store to a new folder/drive

Anonymous (anonymous@undisclosed.example.com) — 2019-11-12T16:10:42+00:00

v5 - Move the message store to a new folder/drive Here is an alternative method, which may be simpler, but only moves the data, not the whole database store (which is a subtle difference) This guide assumes you want to just move the VPOP3 message store/database to a new folder on the same PC, and leave the VPOP3 installation directory where it is.

How to move VPOP3 V5+ to a new folder

Anonymous (anonymous@undisclosed.example.com) — 2021-03-19T16:01:48+00:00

How to move VPOP3 V5+ to a new folder This guide assumes you want to move the whole of VPOP3 (including the message store) to a new folder on the same PC * Stop VPOP3 * Stop VPOP3DB * Remove the VPOP3DB service * Move VPOP3 to the new folder

VPOP3 Historical Logger Backlog

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

VPOP3 Historical Logger Backlog This problem is primarily related to VPOP3 versions 2.5 -> 2.6. Theoretically it could happen on later versions, but would be extremely unusual (see the note at the bottom if you are using version 3.0 or later) You get an error message with subject

VPOP3 Not Starting Properly

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

VPOP3 Not Starting Properly If VPOP3 is not starting properly, then the first thing to check is whether the database server is starting. In VPOP3 v3 and later, VPOP3 uses a PostgreSQL Database server for data storage, so if the database server is not running, VPOP3 will not be able to start properly. In this case, the VPOP3.EXE process may appear in Task Manager, but it won't respond to anything, or it may appear in Task Manager and then stop after a short period.

Spamfilter Whitelist & Blacklist

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Spamfilter Whitelist & Blacklist The VPOP3 spamfilter has a whitelist and a blacklist for sender addresses. It also has a whitelist and blacklist for words/phrases. You can view these lists in the VPOP3 settings by going to Settings -> Spamfilter ->

421 4.3.2 VPOP3 Too many connections from your IP address - try later

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

421 4.3.2 VPOP3 Too many connections from your IP address - try later If you see this error message when you are sending messages, then it means that VPOP3 has detected too many simultaneous connections from your IP address. This would usually happen if the sender is another mail server as they can make many simultaneous connections when there are lots of messages to send. The error code that VPOP3 gives means that the sender should try sending the messages later, so it should be possible to e…

550/553 Not Permitted error from BT Internet's mail servers

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

550/553 Not Permitted error from BT Internet's mail servers BT Internet's mail servers only allow messages to be sent from 'approved' email addresses. If you try to send messages from other addresses BT's mail servers may return a '550 Not Permitted' error, a '553' error, or may silently discard the message depending on what their server feels like doing today.

1069 or 7000 Login Failure error when starting VPOP3DB service

Anonymous (anonymous@undisclosed.example.com) — 2019-11-13T15:35:55+00:00

1069 or 7000 Login Failure error when starting VPOP3DB service A 1069 or 7000 login failure error when starting the VPOP3DB service usually means that something is 'wrong' with the vpop3postgres account in Windows - the password may have expired, or someone may have reset the password.

Socket Error 10054 - The virtual circuit was reset by the remote end

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Socket Error 10054 - The virtual circuit was reset by the remote end Error 10054 means that the connection between VPOP3 and a remote computer (eg the ISP or another computer on your LAN) was disconnected by something outside of VPOP3. This is often caused by anti-virus software or Internet security/firewall on the VPOP3 machine but it could be any of a number of things. Any software or hardware that is sitting between VPOP3 and the ISP could be the root cause.

Allow Remote Access to VPOP3 Mailboxes

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Allow Remote Access to VPOP3 Mailboxes Sometimes people want to be able to access their office VPOP3 mail server from a remote site or mobile phone etc. These instructions assume you have a permanent Internet connection (eg ADSL, Cable etc). If you don't have a permanent Internet connection, see

Alternative method of automatically starting VPOP3

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Alternative method of automatically starting VPOP3 VPOP3 usually automatically starts as a Windows service. Sometimes this does not work, either because other services need to start first, or Windows is going very slowly at startup, causing the database service to time out, or there are certain database control files which did not get cleared after a previous Windows shutdown.

Configuring Calendar on iOS

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Configuring Calendar on iOS These instructions are for configuring a new Calendar account on iOS for iPhone, iPad and iPod Touch. The version of iOS used for these instructions is iOS v6.0, but they will probably work or help with other versions of iOS.

-ERR Can't open the message file - it's gone!

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

-ERR Can't open the message file - it's gone! If VPOP3 receives the error message “-ERR Can't open the message file - it's gone!” from your ISP's POP3 server when it is downloading messages, this is a symptom of a fundamental bug in your ISP's POP3 server.

Error Message Handling

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Error Message Handling VPOP3 will normally send an error message to the Main Administrator every time it encounters an error. We recommend you leave it like this in most cases - if an error message occurs repeatedly, then it usually means there's an underlying problem which needs resolving rather than ignoring.

How to estimate Database Upgrade Time

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to estimate Database Upgrade Time When upgrading from VPOP3 version 3 or 4 to version 5, the PostgreSQL database engine needs to be upgraded. This involves backing up the database data, upgrading the database engine, then restoring the data. This can take some time on large databases.

Full Text Search

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Full Text Search In VPOP3 Enterprise v7.0 a facility for full-text-search on message content was added. Because the full-text-search indexes can be quite big, this facility is optional. For several reasons, the full-text-search is stored in a separate PostgreSQL database. This means that it is not backed up with your standard backups. After a restore, the full-text-search index can be rebuilt from the raw message content.

Configuring iCal on Mac OSX to connect to VPOP3's CalDAV service

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Configuring iCal on Mac OSX to connect to VPOP3's CalDAV service This requires VPOP3 v6 or later. The following instructions are for Mac OS X v10.7.5 but should work with similar versions. We have not been able to create an account by going to System Preferences

Using IMAP4 with VPOP3 Enterprise

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Using IMAP4 with VPOP3 Enterprise VPOP3 Enterprise supports IMAP4 email clients (VPOP3 Basic does not). With IMAP4 the email folders and messages are stored on the mail server. The email client then synchronises with the server. Also, unlike with POP3, several things can access the same mailbox at once.

Installation Errors

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Installation Errors This page lists some errors which may occur during installation and the solution. In general, do NOT 'ignore' any errors unless we tell you to. If you have to retry an installation, when it is an upgrade from versions 1 - 4 going to version 5 or later, then make sure you have told the installer to install the database. Sometimes a partial installation will make the installer think that the database is already installed.

Setting up an iPhone/iPad/iPod Touch

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Setting up an iPhone/iPad/iPod Touch To set up an iPhone to access VPOP3's mail, you first of all need to configure VPOP3 to allow access by remote users (unless you will only be using the iPhone in the office, connected via WiFi to the office LAN). Adding the mail account to your iPhone/iPad

The ISP needs SMTP Authentication

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

The ISP needs SMTP Authentication If your ISP needs you to use SMTP authentication when sending mail to them, then you just need to tell VPOP3 to use authentication when sending. Click the Mail Connectors button at the top of the page, then click on the relevant

How to configure Mozilla Thunderbird

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to configure Mozilla Thunderbird This article won't show you all the possible settings in Thunderbird, because there are so many. Thunderbird is one of the most powerful & flexible email clients available at the time of writing, especially if you use IMAP4 (with VPOP3 Enterprise).

How to Obtain Message Headers

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to Obtain Message Headers Most people are familiar with mail headers such as From:, To:, Subject: etc. but there are many more which most people never see. Quite often we need to see the full internet mail headers from an e-mail that is causing problems. This article explains how to get hold of them in some of the more common e-mail clients.

Obtaining Windows Event Log

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Obtaining Windows Event Log Sometimes, the VPOP3 technical support team may need to see entries from the Windows Event log, especially those relating to VPOP3 or the PostgreSQL service. If there are too many entries simply to copy, you can save them to a file to email to technical support.

Require SMTP Authentication

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Require SMTP Authentication There are some situations where VPOP3 needs to know who is sending mail. This may be if you have VPOP3 configured to behave differently depending on who is sending messages - eg if you have different message size limits depending on the sender, or if you have message monitoring configured for certain users, or you don't want certain people to be able to send mail at all.

How to Restore a backup of VPOP3

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to Restore a backup of VPOP3 The instructions below are to restore a full backup. You may also be able to recover deleted messages if you do not need to restore a full backup. Version 5 or later If you just need to restore a database backup, see steps 4 to 7 below.

Spam filter / Content filter scripts

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Spam filter / Content filter scripts The spam filter system uses basic scripting language for processing messages. This can be used for custom content filtering as well if you need to look inside the messages (e.g. at message content, attachments) as well as at the message headers etc.

The message could not be loaded. Please return to the Quarantine page and try again

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

The message could not be loaded. Please return to the Quarantine page and try again This error normally means the message file has been deleted from the hard disk (probably by a virus scanner or something else on the PC). If you can find the message in the VPOP3 settings (Settings

Timeout problems downloading/uploading messages with attachments

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Timeout problems downloading/uploading messages with attachments There are various possible reasons for this, usually to do with third party internet security software but they may also be associated with Windows TCP/IP or dial-up adapter issues. You may not have problems with other software, but that doesn't mean the problem is being caused by VPOP3.

How to upgrade your VPOP3 licence

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to upgrade your VPOP3 licence You can purchase a VPOP3 upgrade by going to You will need to enter your current licence details, and the website will give you your upgrade options. If you want to upgrade the licence size or from VPOP3 Basic to VPOP3 Enterprise at the same time as upgrading to the latest version of VPOP3, then choose the 'Upgrade to the latest version' option, and you will be given further choices of licence upgrades you can …

How To Upgrade VPOP3

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How To Upgrade VPOP3 Note: if you are upgrading to VPOP3 version 5 or later from version 4 or earlier, please see How To Upgrade VPOP3 to version 5 Upgrading VPOP3 is a straightforward process. Download VPOP3 from our web site and ideally back up your current installation just in case something goes wrong. Then simply run the installer that you downloaded and install it over the top of your existing VPOP3. All your settings and mail will be preserved.

Using a Mobile Phone with VPOP3

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Using a Mobile Phone with VPOP3 Many people want to use a mobile phone to send/receive their email nowadays. This is usually easy to do with VPOP3. The recommended way is to have the phone connect directly to VPOP3 for sending/receiving email. To do this, you need to do three things:

Using VPOP3 with Microsoft Exchange Server

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Using VPOP3 with Microsoft Exchange Server You can link VPOP3 to Exchange Server, so that Exchange Server sends outgoing mail through VPOP3 and VPOP3 sends any incoming mail directly to Exchange Server. You should first of all set up VPOP3 to send and receive Internet email as described in the online help.

How To Move VPOP3 Version 2 to a New PC

Anonymous (anonymous@undisclosed.example.com) — 2019-11-12T16:06:44+00:00

How To Move VPOP3 Version 2 to a New PC (Also applies to version 1.x) To move VPOP3 to a new PC you should go through the following steps: * Copy the VPOP3 files * Copy the VPOP3 directory and subdirectories from the old PC to the new PC. (If you are moving to Windows Vista/2008/7/2012/8 or later, do NOT copy the files to a 'Program Files' folder on the new PC. Recent versions of Windows have special protection for those folders, which is not compatible with VPOP3)

How To Setup VPOP3 Service Security

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How To Setup VPOP3 Service Security VPOP3 can be configured to restrict access to its various services depending on the client computer's IP address. This is useful if you want to allow access from only certain IP addresses (eg within your LAN) and prevent access from other IP addresses (eg the Internet).

VPOP3 Deleting messages as 'old' messages

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

VPOP3 Deleting messages as 'old' messages If VPOP3 says 'deleting old message' in the status window activity log that means that it has seen the unique ID of that message before, longer ago than the time specified for VPOP3 to leave messages on the server, so it thinks that the message is an old message, and so deletes it.

VPOP3 Status Monitor Problems

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

VPOP3 Status Monitor Problems The VPOP3 Status Monitor is the program which shows the little (usually red) postbox icon in the Windows task tray. This usually launches automatically from the Windows startup group. This program is VPOP3Status.EXE on the disk, or can be run manually from

VPOP3 Server Access Not Allowed

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

VPOP3 Server Access Not Allowed If you get an error like: -ERR VPOP3 Server access not allowed! when trying to access VPOP3, then this means that the relevant server's IP Access Restrictions defined in VPOP3 do not allow access from your client computer.

450 4.3.2 Content Filter Timeout

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

450 4.3.2 Content Filter Timeout If you get this error appearing when messages are sent to VPOP3, either in a bounce message, or in the VPOP3 status monitor, it means that the VPOP3 computer filter is taking more than the allowed amount of time (usually 60 seconds).

550 5.7.1 Recipient Prohibited (x)

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

550 5.7.1 Recipient Prohibited (x) (where 'x' is a number) This means that you have an SMTP rule which is rejecting this recipient. The (x) indicates the SMTP rule number which is causing the rejection. View & edit your SMTP rules at Services -> SMTP Server

Socket Error 10048 - Specified Address Already in Use

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Socket Error 10048 - Specified Address Already in Use This error only normally occurs during VPOP3 startup. It occurs if some other software running on the same machine as VPOP3 is using one of the ports that VPOP3 is already using. This could be a proxy like WinGate, WinProxy or anti-virus software that acts as a proxy, an LDAP server (e.g. Active Directory) or another mail server program (e.g. Exchange Server). The latter two causes are particularly common on

Socket Error 10053 - An established connection was aborted by the software in your host machine.

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Socket Error 10053 - An established connection was aborted by the software in your host machine. Error 10053 means that an established connection has been dropped. There are three descriptions of this error message we know about, but the descriptions are given by Windows, so they may vary depending on your version of Windows:

Socket Error 10061 - The attempt to connect was forcefully rejected

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Socket Error 10061 - The attempt to connect was forcefully rejected Error 10061 means that the computer which VPOP3 was trying to connect to (probably at your ISP) refused the connection from the computer running VPOP3. There are several possibilities that can cause error 10061:

Socket Error 10503 - No More Data

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Socket Error 10503 - No More Data Error 10503 means that the connection between VPOP3 and a remote computer (normally your ISP) was dropped at an unexpected time. This is different from the error 10054 in that this is a controlled line drop. One way this can happen is if the ISP's POP3 server uses an obsolete standard which allows it to drop the connection if a POP3 'LIST' command is performed on an empty mailbox. The current standard requires that the connection is not dropped until the clien…

Add a user

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Add a user To add a user account in VPOP3 is very simple. * Go into the VPOP3 settings * Press the Users button at the top of the page to view the user list * Press the New button to create a new user * Enter the user account name and password, and press

How To Allow Mail Relay Through VPOP3

Anonymous (anonymous@undisclosed.example.com) — 2025-05-21T07:57:18+00:00

How To Allow Mail Relay Through VPOP3 If you are allowing remote access into VPOP3 to collect mail then you may also want those remote users to be able to send their outgoing mail through VPOP3 as well. This is more complex than allowing users to collect mail, because, by default, SMTP connections are not authenticated. This means that when someone tries to send a message through VPOP3, VPOP3 doesn't know who that user is. This can cause a problem if unauthorised users try to send mail through…

Attachments have been removed or renamed

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Attachments have been removed or renamed If you have received an email and one or more of its attachments have been removed or renamed, it might be a result of Attachment Filtering. You can inspect the filtering rules by going to Administration Settings -> Settings ->

How to automatically forward spam to the PSCS spamtrap

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to automatically forward spam to the PSCS spamtrap Spam filter companies use “spamtraps” to catch samples of spam for analysis so filters can be updated. We do this here as well. Most types of spam are already caught by our spam traps, however sometimes people get lots of spam which gets through the filter because their particular type of spam does not currently get sent to our spam traps.

Custom filtering incoming mail

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Custom filtering incoming mail If you want to filter incoming mail using custom rules there are a few ways of doing this, depending on your exact requirements. * Download rules - if your incoming mail is via POP3 collection, you want to filter on headers, size etc (not contents)

Data stream contained NUL character

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Data stream contained NUL character Description of the problem NUL characters (bytes with value 0) are not allowed in email messages and should not be transmitted over POP3, SMTP or IMAP4 except in certain circumstances. If an attachment contains such a byte it must be encoded using

VPOP3 Database Size

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

VPOP3 Database Size The VPOP3 directory is stored in the VPOP3\pgsql\data folder and subfolders. If you are concerned about the size of the VPOP3 database, there are several factors which may make the database larger than you would expect: * The VPOP3 database contains a lot more information than just messages in mailboxes. This can include settings, outgoing messages, historical logging information, statistical information for the spamfilter, information about archived messages, etc. Also,…

How to delete a Mail Collector or Connection

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to delete a Mail Collector or Connection To delete a Mail Collector or Connection in version 3, click on the little waste-bin icon at the left of the green bar on the Mail Collector or Connection settings page. We have made this more obvious in version 4, by including a bigger

Delete an outgoing message

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Delete an outgoing message To delete an outgoing message, go into the VPOP3 settings, then go to the 'Users' page. At the top of the page will be a line saying Outgoing Message Queue. Click on that line, and this will show you all the messages waiting to go out. You can now select the message(s) in question, and press the

Don't download big messages during the working day using Download Rules

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Don't download big messages during the working day using Download Rules Say you don't want to download messages over 10,000,000 bytes long between 8:00am and 6:00pm. To do this, create a download rule as: * Rule Type: Ignore * Match Type: All Conditions

How to send a fax by email using the VPOP3 FaxServer

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to send a fax by email using the VPOP3 FaxServer VPOP3 2.1.0 and later together with the VPOP3 FaxServer software allows you to send specially crafted emails to VPOP3 to have them sent as faxes. To do this, send an email to fax@ . The email subject will be the subject of the fax used on the fax cover page. The email should be in plain text (not

Emptying a user's mailbox

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Emptying a user's mailbox To empty a user's 'Inbox' folder, go to the VPOP3 settings. Then click on the Users tab at the top to go to the user list. In the user's list there will be a column displaying the number of messages in the user's Inbox folder. Just to the right of that will be an icon of a waste bin. If you click on that, you will delete all the messages in the user's Inbox folder.

How To Encrypt Sessions

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How To Encrypt Sessions VPOP3 Enterprise 2.6 and later supports SSL/STARTTLS encrypted sessions to VPOP3 itself. So, the email client or web browser will encrypt the data passed to VPOP3 so it cannot be intercepted. This requires an SSL Certificate to be created for VPOP3.

Error 0x80040201 when sending mail in Outlook

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Error 0x80040201 when sending mail in Outlook Often this is because there is 'Read Receipt' stuck in the Outlook out queue, but these do not show in the Outlook Outbox view. We found this article helpful: If you need help with following this, you can call us, but it

Error expanding recipient - Nesting Level too deep

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Error expanding recipient - Nesting Level too deep You receive an error message saying: Error expanding recipient "" Nesting Level too deep (51) Check the configuration for loops (Note the '51' number may be slightly different - that's the nesting level - anything over 50 is detected as an error)

Exceptions

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Exceptions An exception happens if VPOP3 encounters a problem it did not expect. In some cases it can recover automatically, but in other cases that isn't possible. Common causes VPOP3 2.6 and earlier In VPOP3 2.6 and earlier it was quite common for there to be database corruption problems with the SQLite database which was used in those versions.

How to tell VPOP3 that some users in the local domain are not to be handled by VPOP3

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to tell VPOP3 that some users in the local domain are not to be handled by VPOP3 In some situations you will have a situation where most of your users are handled by VPOP3, but several users will collect their mail directly from a separate POP3 account on your ISP, even though they may have an email address on the same domain as other users.

How to install the VPOP3 Status Monitor on other PCs

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to install the VPOP3 Status Monitor on other PCs The VPOP3 status monitor icon is run by a separate program from VPOP3, which communicates with VPOP3 using TCP/IP. This means that this program can be installed on any PC which can connect to the VPOP3 computer using TCP/IP (on port 5109 by default).

Installation checklist

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Installation checklist This list contains some things you may want to check before or after installing VPOP3 to make sure it's not going to encounter any common issues. Before installation * Make sure that VPOP3 is not installed on a RAID 5 or RAID 6 array.

Internationalisation

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Internationalisation VPOP3 has two places where internationalisation can be carried out. In the VPOP3 directory on the server are some *.LNG files. These are language files for the WebMail interface. You can create a new language file by copying the ENGLISH.LNG to another file, eg FRANCAIS.LNG, and then use a text editor (eg Notepad) to edit the text strings in there (the text after the '=' on each line

SMTP error 'Invalid HELO name'

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

SMTP error 'Invalid HELO name' When sending mail you may get an error from the remote SMTP server saying something like 'Invalid HELO name' This happens if the host name configured in VPOP3 does not look like a valid Internet host name (e.g. 'mail.domain.com'). Some SMTP servers don't bother checking this value because it has no authentication value at all, but a few do check that it looks correct.

The ISP needs POP3 before SMTP authentication

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

The ISP needs POP3 before SMTP authentication Some ISPs (especially in Germany) require you to log on to collect your POP3 mail before they will allow you to send any mail through their SMTP relay servers. VPOP3 actually connects to the POP3 server and SMTP server at the same time, so usually it will not have successfully logged onto the ISP's POP3 server before it tries to start sending mail.

ISP needs SSL connection

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

ISP needs SSL connection A few ISPs use a non-standard and not recommended system of encrypting connections to their SMTP mail servers. These generally are called 'SSL' connections and work on an alternate port other than the standard SMTP port 25. (The correct way to encrypt connections is to use a system called TLS which works on the standard SMTP port).

How to limit size of sent mail

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to limit size of sent mail There are several ways to limit the size of mail which can be sent * Limit the size of mail accepted by the SMTP component of VPOP3 * Limit the size sent for a particular user * Limit size based on 'rules' * Limit size based on

Localhost missing from Vista HOSTS file

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Localhost missing from Vista HOSTS file The PostgreSQL database server needs to be able to resolve the 'localhost' name for it to run. On some Windows Vista installations, the HOSTS file seems to be missing the localhost entry (usually it is there, but it seems to be a common problem for it not to be there).

Locked Accounts

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Locked Accounts VPOP3 has a security feature which will lock out an account after it has had several failed login attempts. This feature is to make it harder for an attacker to use a brute force or dictionary password attack on an account. The default settings are that after more than 3 attempts to log into an account with an incorrect password, VPOP3 will lock the account for 30 minutes. You can change these settings on the

Message Downloads Not Completing

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Message Downloads Not Completing The normal reason for message downloads not completing is that a third-party antivirus program is scanning the messages and getting stuck at some point. We recommend that the first thing you do is to temporarily disable the email scanning part of any antivirus program or Internet Security software on the VPOP3 computer (other than those integrated fully with VPOP3 - i.e. 'avast! for VPOP3' or 'Sophos SAV Interface'). Usually that will solve the problem.

How To: Move VPOP3

Anonymous (anonymous@undisclosed.example.com) — 2019-11-12T16:09:34+00:00

How To: Move VPOP3 You can usually move VPOP3 without having to uninstall and reinstall. It is best to move VPOP3 rather than reinstalling from scratch on the new PC or in the new location, because that way you can keep all your existing settings, rather than having to try to recreate them.

How to move messages between users

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to move messages between users There are several ways to do this, depending on your exact needs Via Administrator Console You can view a user's 'Inbox' messages by clicking on the message count on the Users list, then select the messages, choose the target user, and press the

Not Working As Expected

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Not Working As Expected This is the page to come to if you think you've set something up correctly but it isn't doing what you think it should be doing. If you're getting an error message or some other concrete indication that something has actually 'gone wrong' then the

How to Obtain Error Logs

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

How to Obtain Error Logs As part of diagnosing a support issue our support team may ask you to send them various log files. This page explains how to obtain the right files at the right time. How Logging Works Under its default settings VPOP3 logs a minimal amount of information about what it is doing to various files in the main VPOP3 directory. When investigating a support issue it is often the case that we will need you to switch on logging to extra files or increase the level of detail be…

Out of Disk Space When Sending Mail

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Out of Disk Space When Sending Mail The first thing you should do is check that there is enough free disk space on the disk where VPOP3 is installed. VPOP3 requires a certain amount of free space before it will allow new messages to be sent, so the disk might not be totally full, but VPOP3 will still report that there is insufficient disk space when you try to send a new message. This buffer zone is designed to help prevent the disk totally filling up, which can cause lots of bigger problems!

Outlook not able to connect to VPOP3 Enterprise v6.8 when using SSL/TLS

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Outlook not able to connect to VPOP3 Enterprise v6.8 when using SSL/TLS In VPOP3 6.8 SSL v2 is disabled by default (it is considered to be insecure). SSL v3 was released in 1996 and SSL v2 was deprecated because of the well known security flaws. However, it seems that Microsoft Outlook (up to at least Outlook 2010) will not connect to VPOP3 using SSL if VPOP3's SSL v2 is disabled.

Outlook / Outlook Express is sending mail repeatedly

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Outlook / Outlook Express is sending mail repeatedly If you are using Outlook or Outlook Express you may occasionally find that mail is being sent repeatedly. There are a couple of possible reasons for this which we know of Sending taking too long

Problems with installing PostgreSQL during VPOP3 Installation

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Problems with installing PostgreSQL during VPOP3 Installation Sometimes people have problems with the PostgreSQL installation part of the VPOP3 installation. Below are some things to look at. * Check that 'Local System' (or 'System') has full access to the VPOP3 installation directory

Problems accessing VPOP3 Settings

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Problems accessing VPOP3 Settings If you have problems accessing the VPOP3 settings: * Go to Start -> Programs -> VPOP3 -> Configure VPOP3 on the VPOP3 computer. That should open up a web browser and take you to the login page * If VPOP3 doesn't show the login page, and shows a '403' error page instead, that means that the access restrictions for the WebMail service have been restricted so that this computer cannot access the WebMail service.

Problems sending mail via BT from your own domain

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Problems sending mail via BT from your own domain BT Internet only allow you to send mail through their mail servers from your BT Internet address or other registered address. Attempts to send from other addresses will give you a 553 SMTP error message.

Problems sending messages to spam@

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Problems sending messages to spam@ If a VPOP3 user forwards a message to spam@, then the VPOP3 spam filter will train itself that that message was spam. If, when you forward the message, you get an error message like: Subject: Mail Delivery Failure Delivery Failure Report. The following message was incorrectly addressed. Recipient: "spam" is unrecognised.

RBL Checking not working in VPOP3 Enterprise

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

RBL Checking not working in VPOP3 Enterprise VPOP3 Enterprise has an RBL checking feature which is configured in the VPOP3 Settings at Services -> SMTP Server -> SPAM Reduction -> Realtime Blacklist Rules If it does not seem to be working properly, there are a few reasons why the RBL feature may not work.

Restore Deleted Calendars

Anonymous (anonymous@undisclosed.example.com) — 2022-11-18T11:43:52+00:00

Restore Deleted Calendars This article will help if a user has been deleted and all their calendars are lost and need to be restored. Note that this functionality is not built into VPOP3, and requires the use of Python3 to run a script First you need to install Python 3.8 or later, and the psycopg2 plugin

Restricting the number of recipients sent to

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Restricting the number of recipients sent to Some ISPs set restrictions on the number of recipients that you are allowed to send in a certain time period, eg 50 messages per hour, or the number of recipients that you are allowed to send per message or per connection.

Restricting the number of messages sent

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Restricting the number of messages sent Some ISPs set restrictions on the number of messages that you are allowed to send in a certain time period, eg 50 messages per hour, or the number of messages that you are allowed to send per connection. Restriction of messages per connection

Route MX Sent (Direct) Outbound Mail Through Your ISP

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Route MX Sent (Direct) Outbound Mail Through Your ISP Some mail providers (for example Hotmail, AOL and GMail) will reject mail sent from servers running on dynamic IP addresses. It is possible to route such mail through your ISP's relay server whilst still sending most mail direct to the recipient server using MX

Router Problem error messages

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Router Problem error messages If you get an error message to the VPOP3 administrator with subject Router Problem and text Local Distribute to Failed Error: Database Error "ERROR: could not open file "base//": Permission denied"

SAVSERVICE.EXE runs at 90%+ and slows the computer down

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

SAVSERVICE.EXE runs at 90%+ and slows the computer down If you are using Sophos Antivirus on the VPOP3 computer, you may encounter a situation where the computer runs very slowly. If you use the Processes tab in TaskManager you may notice that the SAVSERVICE.EXE process is using most of the CPU.

Sharing IMAP4 folders

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Sharing IMAP4 folders Some email clients will allow you to share IMAP4 folders from within the client itself (eg eM Client) or have plugins to allow this (eg Mozilla Thunderbird with the Imap-ACL extension). In that case, you will need to see the documentation for that to set up sharing.

Signing outgoing mail with DKIM

Anonymous (anonymous@undisclosed.example.com) — 2020-07-22T10:32:40+00:00

Signing outgoing mail with DKIM DKIM, also known as DomainKeys Identified Mail, is a form of email authentication that digitally signs emails to prove that they were sent from authorized domains and aren't fake emails. Companies like Google and Yahoo use DKIM to sign their emails and it is becoming ever more popular.

SMTP Rules

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

SMTP Rules Download rules are applied to messages which arrive at VPOP3 using SMTP - either locally sent messages, or incoming messages received through an SMTP mail feed. To configure the rules, go to the VPOP3 settings, then Services -> SMTP Service

Status Monitor is open during installation

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Status Monitor is open during installation During installation, if the installer says that the VPOP3 Status Monitor is open, and won't let you install VPOP3, that means that Windows is refusing to let the installer overwrite the VPOP3STATUS.EXE program. Usually that means that it is currently running.

Timeout while VPOP3DB is starting

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Timeout while VPOP3DB is starting (Note that VPOP3 v6.11 and later, the service startup system has changed so it should not suffer from this problem) When VPOP3DB starts up, the service control manager component waits a set time for a response from the database server before it knows the service has started. If the PC is going slow (eg after a Windows update or if the PC is just slow) then this wait may not be long enough.

Training the VPOP3 Spam Filter

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Training the VPOP3 Spam Filter The VPOP3 spam filter has a couple of mechanisms which can be used to 'train' it to distinguish between spam and not-spam. Bayesian Filter The Bayesian filter this looks at words in messages sent and received and their probabilities of being contained in spam and not-spam, and works out an overall probability of the message being spam or not-spam based on the combination of those probabilities.

Transmission Receipt Message

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Transmission Receipt Message This is not an error message, but we are listing it here because it confuses some people. VPOP3 sends a 'Transmission Receipt' when a message is sent out, and it contains a header asking for the receipt. The default configuration is that it will send the transmission receipt if the sender asks for a read receipt.

Undelete Messages in VPOP3 Enterprise v5 or later

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Undelete Messages in VPOP3 Enterprise v5 or later If a user accidentally deletes messages or a message folder, you can easily undelete this within a few days. The amount of time that messages are stored in the VPOP3 'recycle bin' is set in Settings

How to upgrade VPOP3 to version 7 or later from version 6 or earlier

Anonymous (anonymous@undisclosed.example.com) — 2020-06-29T10:43:58+00:00

How to upgrade VPOP3 to version 7 or later from version 6 or earlier As usual the process to upgrade is simply to install the later version over your existing installation (do not uninstall anything first). The below is technical information detailing an extra step performed by the installer in this particular upgrade step.

Upgrading VPOP3 to version 8.x from v7 or earlier

Anonymous (anonymous@undisclosed.example.com) — 2020-09-03T15:07:34+00:00

Upgrading VPOP3 to version 8.x from v7 or earlier VPOP3 v8.x uses PostgreSQL 10 as its database engine, which is the latest supported 32 bit version of PostgreSQL. Later versions of PostgreSQL are 64-bit only, which means we cannot use them while continuing to support 32 bit versions of Windows.

Upgrading VPOP3 to version 9.x from v7 or v8

Anonymous (anonymous@undisclosed.example.com) — 2026-03-18T20:49:54+00:00

Upgrading VPOP3 to version 9.x from v7 or v8 VPOP3 v9 and later requires a 64 bit version of Windows 8.1 or later VPOP3 v9.x uses PostgreSQL 18 as its database engine. This can only easily be upgraded from PostgreSQL 9.3 or later, which means it must be an upgrade of VPOP3 v7 or later. If you are using an earlier version of VPOP3, then upgrade it to v8.7 first, then upgrade to v9 or later

Use Download Rules for incoming POP3 message filtering

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Use Download Rules for incoming POP3 message filtering If you have VPOP3 retrieving messages from a POP3 account on an ISP, then you can use Download Rules to do basic filtering on incoming messages. (If you have incoming SMTP, then use SMTP Rules instead) Download rules cannot perform all mail filtering tasks. For more features,

Using VPOP3 Spam Filtering with LAN Forwarding

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Using VPOP3 Spam Filtering with LAN Forwarding When using the VPOP3 Spam filter with LAN forwarding you need to be aware a bit of how it works. The spam filter will only quarantine messages which are going to a VPOP3 user. This is because that user needs to be able to log into VPOP3 to be able to view their quarantined messages.

Error message: VPOP3 does not have write access to the registry - please check and restart VPOP3

Anonymous (anonymous@undisclosed.example.com) — 2018-11-14T10:45:49+00:00

Error message: VPOP3 does not have write access to the registry - please check and restart VPOP3 VPOP3 needs to be able to write to the Windows Registry at HKEY_LOCAL_MACHINE\Software\PaulSmith. Usually, VPOP3 will run in the 'Local System' user account which has full permission to the HKEY_LOCAL_MACHINE part of the registry. However, it is possible to lock down permissions further, or to run VPOP3 in a different user account. In that case, you may encounter this error message.