https://wiki.pscs.co.uk/ 2026-05-06T06:17:27+00:00 https://wiki.pscs.co.uk/ https://wiki.pscs.co.uk/_media/wiki:dokuwiki.svg text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:restore_a_backup_of_vpop3?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:use_the_vpop3_status_monitor?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3_is_using_a_lot_of_disk_space?rev=1542192349&do=diff VPOP3 is using a lot of disk space If VPOP3 is using a lot of disk space, the problem is usually that there is lots of data there, so it has to use the disk space. Message Storage In VPOP3 version 5 and later, all users' messages are stored in the database, so they will occupy space in the VPOP3\pgsql\data folder. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:exchange_2007?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:out_of_disk_space_when_sending_mail?rev=1542192349&do=diff 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! text/html 2024-01-15T11:35:45+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:repairing_corrupted_database?rev=1705318545&do=diff 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). text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3_access_security?rev=1542192349&do=diff 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). text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:backup_vpop3?rev=1542192349&do=diff 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). text/html 2026-03-23T10:18:43+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:create_an_ssl_certificate?rev=1774261123&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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 using text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:delete_outqueue_messages_directly_from_the_database?rev=1542192349&do=diff 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. text/html 2019-11-12T16:09:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:v3_-_move_to_a_new_pc?rev=1573574948&do=diff 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 text/html 2026-04-21T11:12:40+00:00 Anonymous (anonymous@undisclosed.example.com) 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 PC text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:421_4.3.2_vpop3_smtp_server_access_disabled_-_content_scanner_problem?rev=1542192349&do=diff 421 4.3.2 VPOP3 SMTP Server access disabled - content scanner problem! This usually happens if the “VPOP3 AV” virus scanner has a problem it can't automatically recover from. This may be a fatal error, or a licencing issue. You can check this on the Settings text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:421_4.3.2_vpop3_smtp_server_access_disabled_-_low_memory?rev=1542192349&do=diff 421 4.3.2 VPOP3 SMTP Server access disabled - low memory! This error means that VPOP3 has detected that there is not enough free memory available on the server. If this happens it refuses to accept new messages because that may make the PC crash and possibly lose data. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:copy_outgoing_mail?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:seeing_where_a_message_came_from?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:sending_mail_from_different_email_addresses_or_domains?rev=1542192349&do=diff Sending mail from different email addresses or domains VPOP3 does not (by default) place any restrictions on which email addresses or domains you can send mail from. However, there may be external restrictions on which email addresses/domains you can send from. For instance, if you send mail through your ISP's mail server, they may only allow you to send mail from specific addresses, or the domain you send mail from may have a sender policy defined, such as text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:setup_steps_for_multiple_pop3_accounts_at_the_isp?rev=1542192349&do=diff 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. text/html 2020-07-22T10:32:40+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:signing_outgoing_mail_with_dkim?rev=1595413960&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:smtp_rule_example_-_restrict_who_can_send_to_a_local_email_address?rev=1542192349&do=diff SMTP Rule Example - restrict who can send to a local email address If you have a local email address (a user, group or distribution list) and you want to restrict which email addresses can send messages to this address, you can use SMTP rules. There are a few ways you can configure the SMTP rules for this scenario. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:the_message_could_not_be_loaded._please_return_to_the_quarantine_page_and_try_again?rev=1542192349&do=diff 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 text/html 2020-06-29T10:43:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:upgrade_vpop3_to_version_7?rev=1593427438&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3_deleting_messages_as_old_messages?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:421_4.3.2_vpop3_too_many_connections_from_your_ip_address_-_try_later?rev=1542192349&do=diff 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… text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:552_5.2.3_message_too_large_-_contact_your_administrator?rev=1542192349&do=diff 552 5.2.3 Message too large - contact your administrator Or 552 5.2.3 Message exceeds fixed maximum message size If this error message is coming from VPOP3 when you are sending a message, it means that the message you are sending is prohibited by your VPOP3 settings. There are two places where the size limit could be set. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:10053?rev=1542192349&do=diff 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: text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:creating_extra_smtp_services?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:database_maintenance?rev=1542192349&do=diff 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… text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:emptying_a_user_s_mailbox?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:encrypt_sessions?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:err_can_t_open_the_message_file_-_it_s_gone?rev=1542192349&do=diff -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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:error_message_handling?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:exchange_2003?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:forwarded_emails_not_arriving?rev=1542192349&do=diff Forwarded Emails Not Arriving If you are having problems having VPOP3 forward incoming messages to an external address, but sending messages directly to that address works OK, and forwarding internal messages to that address works OK, then the problem may be the SMTP return address which VPOP3 is using. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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 m&uuml;ssen 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/html 2021-03-08T10:48:40+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:install_vpop3?rev=1615200520&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:internationalisation?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:localhost_missing_from_vista_hosts_file?rev=1542192349&do=diff 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). text/html 2026-04-06T17:59:47+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:mail_not_downloading_from_isp?rev=1775498387&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:mozilla_thunderbird?rev=1542192349&do=diff 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). text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:outlook_outlook_express_are_sending_mail_repeatedly?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:pop3_client_connection_problem?rev=1542192349&do=diff VPOP3 - POP3 Client Connection Problem These errors occur during the period when VPOP3 is trying to establish a connection to your ISP's POP3 mail server to receive incoming mail. They can mean that you have entered the POP3 Server address incorrectly, or that there is a problem with the network, or that your ISP's mail server is not working properly. text/html 2019-02-06T17:10:31+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:postgresql_replication?rev=1549473031&do=diff 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… text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:postgresql_server_won_t_start_due_to_damaged_log_files?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:quarantine?rev=1542192349&do=diff Spam Quarantine By default, when the VPOP3 spam filter detects a message as being spam, it will go to the user's quarantine. Users can release messages from the quarantine by going to their webmail page and selecting the message from the quarantine list there. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:remove_messages_from_the_outbound_queue?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:require_smtp_authentication?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:sender_policy_framework?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:smtp_client_connection_problem?rev=1542192349&do=diff VPOP3 - SMTP Client Connection Problem These errors occur during the period when VPOP3 is trying to establish a connection to your ISP's SMTP mail server to send outgoing mail. They can mean that you have entered the SMTP Server address incorrectly, or that there is a problem with the network, or that your ISP's mail server is not working properly. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:spam_filter_not_working?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:timeout_problems_when_sending_or_receiving_attachments?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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/html 2018-12-05T15:25:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:v3_-_move_message_store_folder?rev=1544023524&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3_is_responding_slowly?rev=1542192349&do=diff VPOP3 Is Responding Slowly If VPOP3 is responding slowly to users there are several common causes: * The VPOP3 server disk may be badly fragmented. Defragment the server disk(s). Note that sometimes the Windows defragmenter will say that the disk doesn't need defragmenting even if it does, so it is best to do it anyway. Also, there is a better free defragmenter available called text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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/html 2026-01-05T09:31:47+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3_re-downloading_old_messages_from_isp_pop3_server?rev=1767605507&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3_xxxxx_server_access_not_allowed_-_see_your_administrator?rev=1542192349&do=diff Error Message - VPOP3 xxxx Server Access Not Allowed - See Your Administrator If you get an error message when trying to connect to the VPOP3 SMTP/POP3/IMAP4/etc service which says VPOP3 xxxx Server Access not allowed - See your administrator (where xxxx is replaced with the specific service name, and there may be protocol specific error codes before the message) text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:your_connection_has_been_blocked_temporarily_-_try_again_later?rev=1542192349&do=diff Error message: Your connection has been blocked temporarily - Try again later If you get an error message in your email client software saying Your connection has been blocked temporarily - Try again later or Server access temporarily blocked! Please try again later text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:450_4.3.2_content_filter_timeout?rev=1542192349&do=diff 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). text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:550_5.7.1_relaying_not_allowed_bad_sender_ip_address?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:550_not_permitted?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:10047?rev=1542192349&do=diff Socket Error 10047 - Addresses in the specified family cannot be used with this socket Meaning: Addresses in the specified family cannot be used with this socket This error only normally occurs during VPOP3 startup. There are two main possible reasons for this error: text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:10048?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:10054?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:10055?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:10061?rev=1542192349&do=diff 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: text/html 2025-05-21T07:57:18+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:allowing_mail_relay_through_vpop3?rev=1747814238&do=diff 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… text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:alternative_method_of_automatically_starting_vpop3?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:archiving_not_saving_messages_on_a_shared_drive?rev=1542192349&do=diff Archiving not saving messages on a shared drive If the VPOP3 archive facility is reporting “Possible error accessing main store directory” and the archive store directory is a drive on another network computer, then there are a few possible difficulties that you have to be aware of. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:attachments_have_been_removed_or_renamed?rev=1542192349&do=diff 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 -> text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:autoresponders_out_of_office?rev=1542192349&do=diff Autoresponders / Out of Office VPOP3 has an autoresponder facility for sending automatic replies when a message arrives in a mailbox. This is often used for 'Out of Office' replies, but it is not limited to that use. To set an autoresponder, the administrator can edit the user and go to the text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:backscatter?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:c_error_popup?rev=1542192349&do=diff C++ Error Popup If VPOP3 crashes with a C++ error popup window, that means that an 'exception' has been thrown - something unusual has happened, and VPOP3 doesn't know how to recover automatically. Often these are due to database errors. There are two places you can look for the cause of the error: text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:calendar_on_ios?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:calendars?rev=1542192349&do=diff Calendars To use the calendar facility in VPOP3 you need a CalDAV aware client. We have tested it with the free Mozilla Sunbird & Lightning products as well as the emClient email client. These products need a URL to be able to access the CalDAV data store. Once you have the URL (see below), copy it into the text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:can_t_alter_dates_in_autoresponder_rules?rev=1542192349&do=diff Can't alter dates in Autoresponder Rules If you try to edit an Autoresponder Rule which has a start/end time set, you may notice that you can't edit the dates in there. This is because VPOP3 prevents you from setting it so that the “start date” is after the “end date text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:changing_a_user_s_password?rev=1542192349&do=diff Changing a user's password To change a user's password in VPOP3, you should log into the VPOP3 settings, go to the 'Users' page, then double-click on the user whose password you want to change. This will bring up a window giving you access to the user's settings. Go to the 'Passwords' tab where you can set the passwords. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:configure_a_router_to_allow_incoming_smtp?rev=1542192349&do=diff 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 … text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:create_a_connection_method?rev=1542192349&do=diff How to Create a Connection There are two ways that VPOP3 can be configured to connect to the Internet. Which one you use depends on the service provided by your ISP. Using a Permanent 'Always On' Connection This is the most common connection method. It assumes you are connecting to the Internet via a router which is permanently connected. In this scenario VPOP3 simply needs to connect to the router so setting up VPOP3 is very simple. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:custom_filtering_incoming_mail?rev=1542192349&do=diff 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) text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:download_rules?rev=1542192349&do=diff Download Rules Download rules are applied to messages downloaded using a POP3 mail collector. To configure the rules, go to the VPOP3 settings, then Mail Connectors -> Mail Collectors -> POP3 General. There is an Edit Download Rules button which brings up the download rule editor. To tell this mail collector to use the download rules, ensure that the text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:err_unknown_user?rev=1542192349&do=diff -ERR Unknown User -ERR Unknown User is a POP3 error. There are two places you can receive it: * If you receive it as part of a 'POP3 Client Error' email message from VPOP3, then it means that VPOP3 was unable to log on to your ISP's mail server because the ISP POP3 server reported an error text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:error_0x80040201_when_sending_mail_in_outlook?rev=1542192349&do=diff 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: <http://www.howto-outlook.com/howto/deletereadreceipt.html> If you need help with following this, you can call us, but it text/html 2025-10-06T15:21:37+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:error_messages?rev=1759764097&do=diff Error Messages This is the place to look if you are trying to trouble shoot a problem and you have received or have access to a specific error message or error code. If instead your problem is that something you think is set up correctly is not working then the best place to look would be the text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:filtering_attachments?rev=1542192349&do=diff How to filter attachments VPOP3 can filter attachments in several ways. The most general is to use the Settings -> Attachment Processing -> Filtering tab as described below. VPOP3 can also filter attachments using the content/spam filter, or by using an integrated virus scanner. text/html 2025-08-18T15:13:06+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:forward_messages_to_an_external_address?rev=1755529986&do=diff How to Forward Messages to an External Address There are two possible methods to forward messages to an external address: * Use this method if it is for a person who might want to receive their email whilst in the office and/or get the mail sent to an external address. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:full_text_search?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:handling_mail_for_multiple_incoming_domains?rev=1542192349&do=diff 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… text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:ical_on_mac_osx?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:initial_user?rev=1542192349&do=diff Initial User When you install VPOP3 it will ask you to create an initial user. This counts towards your user count and is created as your initial administrator account. More administrator accounts can be created later if you wish, and you can remove the initial user if you wish. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:install_the_status_monitor_on_other_pcs?rev=1542192349&do=diff 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). text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:iphone?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:is_it_possible_to_stop_messages_that_vpop3_downloads_from_being_marked_as_read?rev=1542192349&do=diff Is it possible to stop messages that VPOP3 downloads from being marked as read? VPOP3 does not mark messages as read when it downloads them. In fact, the POP3 protocol doesn't have a system available for marking messages as read, so it is impossible for VPOP3 to mark messages as read. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:limit_size_of_sent_mail?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:locked_accounts?rev=1542192349&do=diff 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 text/html 2026-04-06T17:57:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:make_vpop3_redownload_messages_from_isp?rev=1775498220&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:moving_messages?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:mx_send_warning?rev=1542192349&do=diff MX Send Warning - ..... If you see the text 'MX Send Warning - <error message>' in the VPOP3 status monitor, that means that VPOP3 is trying to send a message to another mail server using the MX send method (direct to the recipient's mail server) and text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:no_transport_provider_is_available?rev=1542192349&do=diff Outlook/Windows Messaging reports "No transport provider is available" If Outlook or Windows Messaging reports No transport provider is available when trying to connect to VPOP3, it can mean several things. (This must be a contender for “the world's most meaningless error message text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:obtaining_message_headers?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:obtaining_windows_event_log?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:performance_requirements?rev=1542192349&do=diff 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: text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:pop3_client_problem?rev=1542192349&do=diff VPOP3 - POP3 Client Problem These errors occur whilst VPOP3 is communicating with your ISP's POP3 mail server to retrieve your mail. The server connection was closed unexpectedly If the message text is Error with Pop3 Client (XXXX (YY)) The server connection was closed unexpectedly text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:rbl_checking_not_working_in_vpop3_enterprise?rev=1542192349&do=diff 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. text/html 2025-09-11T13:48:07+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:recovering_messages_from_corrupted_database_into_fresh_database?rev=1757598487&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:restore_folder_-_v5?rev=1542192349&do=diff Restore selected mail folders or mailbox in VPOP3 v5 or later (This option is only available in VPOP3 Enterprise) First - if the problem is that messages were deleted very recently (the default is within 3 days), you can probably use the Undelete feature in VPOP3. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:smtp_client_problem?rev=1542192349&do=diff VPOP3 - SMTP Client Problem These errors occur whilst VPOP3 is communicating with your ISP's SMTP mail server to send your mail. If the message text is: Error with SMTP Client (XXXX (YY)) The server connection was closed unexpectedly Then this means that the the connection between VPOP3 and your ISP's SMTP mail server was closed when VPOP3 did not expect it to be. This can be caused by the network connection failing or a bug in the ISP's mail server which drops the connection in abnormal circ… text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:smtp_rules?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:start_vpop3?rev=1542192349&do=diff How to start VPOP3 There are two ways to start VPOP3 * as a service * as a normal application For normal operation, you will start VPOP3 as a service, as this means that VPOP3 will run even when no one is logged into the PC. To help with some types of problem diagnosis it can be better to start it as an application. This makes VPOP3 run in the account of the currently logged in user, rather than the service account, so it can eliminate access permission problems. Also, when VPOP3 starts a… text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:status_service_disabled?rev=1542192349&do=diff VPOP3 Status Service Disabled In some versions of VPOP3, occasionally the Status Service may get disabled if there was a problem during initialisation - this will prevent the VPOP3 Status Monitor from connecting to VPOP3. To check this, run RegEdit, and find text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:troubleshooting_tips?rev=1542192349&do=diff Troubleshooting Tips Telnet One of the most basic, and useful, tools for troubleshooting email systems is a Telnet client. Installing Telnet Client Unfortunately, since Windows XP, Microsoft do not install the Telnet client into Windows by default, so you may need to install the Telnet client yourself. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:undelete?rev=1542192349&do=diff 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 text/html 2020-09-03T15:07:34+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:upgrade_vpop3_to_version_8?rev=1599145654&do=diff 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. text/html 2026-03-18T20:49:54+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:upgrade_vpop3_to_version_9?rev=1773866994&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:using_vpop3_spam_filtering_with_lan_forwarding?rev=1542192349&do=diff 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. text/html 2018-12-05T15:25:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:v3_-_move_to_a_new_folder?rev=1544023541&do=diff 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 text/html 2019-11-12T16:10:42+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:v5_-_move_the_message_store_to_a_new_folder_drive?rev=1573575042&do=diff 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. text/html 2021-03-19T16:01:48+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:v5_-_move_to_a_new_folder?rev=1616169708&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3_2.x_crashes_when_user_tries_to_download_mail?rev=1542192349&do=diff VPOP3 2.x crashes when user tries to download mail If VPOP3 2.x crashes when a user tries to download mail, there are a few possible causes we know of: * A virus scanner or Internet security software is interfering with the connection between VPOP3 and the email client and is either terminating VPOP3 deliberately, or is blocking VPOP3 causing another part of it to crash text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3_alert_-_non-existent_user?rev=1542192349&do=diff Error message: VPOP3 Alert - Non-existent user - <username> If you receive an error message like: Subject: VPOP3 Alert - Non-existent user - <username> Delivery Failure Report. There was incoming mail for non-existent user "<username>". This means that VPOP3 downloaded a message using POP3 and it was addressed to an email address which does not exist. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3_historical_logger_backlog?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3_sending_high_volumes_of_unrecognised_mails?rev=1542192349&do=diff SMTP Relay Protection in VPOP3 SMTP Relay Protection should be used on ALL SMTP mail servers (such as VPOP3) which have a permanent connection to the Internet. You may also want to use it on servers which are only connected occasionally via a dial-up connection. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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 from text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3_xxxxx_server_access_not_allowed?rev=1542192349&do=diff 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. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) 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 ->