https://wiki.pscs.co.uk/ 2026-05-06T11:51:22+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: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: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: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 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 2019-11-08T15:37:52+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:upgrade_vpop3_to_version_5?rev=1573227472&do=diff 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. 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 2026-01-05T09:31:47+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: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: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 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:automatically_forwarding_spam_to_the_pscs_spamtraps?rev=1542192349&do=diff 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. 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: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:general_configuration_tasks?rev=1542192349&do=diff 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 text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:ghost_folders?rev=1542192349&do=diff IMAP4 'Ghost Folders' Sometimes your IMAP4 email client may show folders in the folder tree, but when you select them, you get an error that the folder does not exist. This happens because IMAP4 has the concept of being able to 'subscribe' to folders - this means that you can hide folders by unsubscribing from them. 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:installation_conflicts?rev=1542192349&do=diff Installation conficts During installation, the installer program does some basic checks for conflicting software. This is software which is providing the same services as the VPOP3 software - i.e. SMTP, POP3 and/or LDAP services. For POP3/SMTP it will show the text which the conflicting software announces itself as. 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:outlook_not_able_to_connect_to_vpop3_enterprise_v6.8_when_using_ssl_tls?rev=1542192349&do=diff 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. 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: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: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:sharing_folders?rev=1542192349&do=diff 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. 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 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:upgrade_vpop3?rev=1542192349&do=diff 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. 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 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:using_advanced_vpop3_features_with_lan_forwarding?rev=1542192349&do=diff Using VPOP3 Advanced Features with LAN Forwarding If you are wanting to use any of VPOP3's advanced features (such as mailing lists, message monitoring, wildcard aliases etc) because you are LAN forwarding to a less capable server, then you will usually need to have VPOP3 do all its normal message routing functions initially, then, as the final stage have it forward the messages on to the other server. 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 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:vpop3_does_not_have_write_access_to_the_registry_-_please_check_and_restart_vpop3?rev=1542192349&do=diff 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. 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 -> 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