PSCS Wiki
https://wiki.pscs.co.uk/
2026-05-13T05:30:07+00:00PSCS Wiki
https://wiki.pscs.co.uk/
https://wiki.pscs.co.uk/_media/wiki:dokuwiki.svgtext/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)VPOP3 Database Size
https://wiki.pscs.co.uk/how_to:database_size?rev=1542192349&do=diff
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,…text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Spamfilter Whitelist & Blacklist
https://wiki.pscs.co.uk/how_to:whitelist_blacklist?rev=1542192349&do=diff
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 ->text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Data stream contained NUL character
https://wiki.pscs.co.uk/how_to:data_stream_contained_nul_character?rev=1542192349&do=diff
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 usingtext/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)How to Obtain Error Logs
https://wiki.pscs.co.uk/how_to:obtaining_error_logs?rev=1542192349&do=diff
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…text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Configure Email Signatures
https://wiki.pscs.co.uk/how_to:configure_email_signatures?rev=1542192349&do=diff
Configure Email Signatures
* Global Signatures
* Personal Signatures
* Webmail Signatures
Notes
When creating a signature it is generally best to keep it as short as possible.
Disclaimers & confidentiality notices in emails are generally regarded as having little or no legal significance, so lengthy signatures just use up bandwidth.text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Exceptions
https://wiki.pscs.co.uk/how_to:exceptions?rev=1542192349&do=diff
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.text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)French Webmail Language File
https://wiki.pscs.co.uk/how_to:french_webmail_language_file?rev=1542192349&do=diff
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…text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)German Webmail Language Page
https://wiki.pscs.co.uk/how_to:german_webmail_language_file?rev=1542192349&do=diff
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 …text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Incoming SMTP Feed
https://wiki.pscs.co.uk/how_to:incoming_smtp_feed?rev=1542192349&do=diff
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:text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Installation checklist
https://wiki.pscs.co.uk/how_to:installation_checklist?rev=1542192349&do=diff
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.text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Outbound Messages Not Appearing in Monitor Target Mailbox
https://wiki.pscs.co.uk/how_to:outbound_messages_not_appearing_in_monitor?rev=1542192349&do=diff
Outbound Messages Not Appearing in Monitor Target Mailbox
For VPOP3 to monitor outbound messages it needs to be able to work out that the message is FROM: a user whose mail should be monitored. To do this it has to examine the FROM: address in the message header.text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Redirect message for a user if a sender is a particular email address
https://wiki.pscs.co.uk/how_to:redirect_message_for_a_user_if_the_sender_is_a_particular_email_address?rev=1542192349&do=diff
Redirect message for a user if a sender is a particular email address
Say you want messages addressed to 'user1' to be redirected to 'user2' if they came from customer@domain.com
This is an unusual requirement, so there is no way to do it in VPOP3.text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Spanish Webmail Language File
https://wiki.pscs.co.uk/how_to:spanish_webmail_language_file?rev=1542192349&do=diff
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…text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Timeout while VPOP3DB is starting
https://wiki.pscs.co.uk/how_to:timeout_while_vpop3db_is_starting?rev=1542192349&do=diff
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.text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Training the VPOP3 Spam Filter
https://wiki.pscs.co.uk/how_to:training_the_spam_filter?rev=1542192349&do=diff
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.text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)Transmission Receipt Message
https://wiki.pscs.co.uk/how_to:transmission_receipt?rev=1542192349&do=diff
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.text/html2026-04-21T11:12:40+00:00Anonymous (anonymous@undisclosed.example.com)Move VPOP3 Version 5 (or later) to a new PC
https://wiki.pscs.co.uk/how_to:v5_-_move_to_a_new_pc?rev=1776769960&do=diff
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 PCtext/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)VPOP3 Not Starting Properly
https://wiki.pscs.co.uk/how_to:vpop3_not_starting_properly?rev=1542192349&do=diff
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.text/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)VPOP3 Status Monitor Problems
https://wiki.pscs.co.uk/how_to:vpop3_status_monitor_problems?rev=1542192349&do=diff
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 fromtext/html2018-11-14T10:45:49+00:00Anonymous (anonymous@undisclosed.example.com)How to write your own spam filter rules
https://wiki.pscs.co.uk/how_to:write_your_own_spam_filter_rules?rev=1542192349&do=diff
How to write your own spam filter rules
VPOP3's spam filter uses a basic scripting language designed for filtering email messages, so a full description of writing your own rules would be very long and complex, as it is really something that only a programmer should do.