https://wiki.pscs.co.uk/ 2026-05-06T11:12:33+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: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:problems_accessing_vpop3_settings?rev=1542192349&do=diff Problems accessing VPOP3 Settings If you have problems accessing the VPOP3 settings: * Go to Start -> Programs -> VPOP3 -> Configure VPOP3 on the VPOP3 computer. That should open up a web browser and take you to the login page * If VPOP3 doesn't show the login page, and shows a '403' error page instead, that means that the access restrictions for the WebMail service have been restricted so that this computer cannot access the WebMail service. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:set_as_administrator?rev=1542192349&do=diff How to Set a User as Administrator VPOP3 has two 'types' of administrator. * Users who can administer VPOP3, and log in and change settings etc. These are normal users, but have the Administrator box checked on the User -> General settings for that user. These user have a red key icon in the users list. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:delete_a_user?rev=1542192349&do=diff How to Delete a User To delete a user from VPOP3, go to Users -> Accounts, select the user you wish to delete, and press the Delete button. Deleting an administrator You cannot delete the user as whom you are currently logged into the VPOP3 settings (e.g. text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:non-administrator?rev=1542192349&do=diff Trying to perform administrative tasks without rights This problem can have two symptoms: * When trying to access the VPOP3 settings you get an error “You are trying to perform an VPOP3 administration task while logged in as a non-administrator text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:not_working_as_expected?rev=1542192349&do=diff Not Working As Expected This is the page to come to if you think you've set something up correctly but it isn't doing what you think it should be doing. If you're getting an error message or some other concrete indication that something has actually 'gone wrong' then the 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:pop3_webmail_imap4_can_t_see_messages_but_admin_can?rev=1542192349&do=diff POP3/Webmail/IMAP4 can't see a user's messages, but the administrator can Version 2.x only. This problem does not occur with version 3 or later. This problem can happen if the user's message index database has become damaged. The POP3, Webmail & IMAP4 services get the message summary data from the database, whereas the administrator console gets the message information directly from the message files on the disk, so if the database is corrupted, the administrator console can still see the mess… 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_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: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: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: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: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 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 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_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: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: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: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:database_backup_failed?rev=1542192349&do=diff Database Backup Failed VPOP3 version 3 and later will, by default, make a backup of the database used by VPOP3 into a file. This uses the PostgreSQL utility 'pg_dump' If an error occurs whilst running this program, VPOP3 will create a 'Database Backup Failed' error message to the administrator. 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:err_mailbox_locked?rev=1542192349&do=diff -ERR Mailbox Locked error If your email client displays an '-ERR Mailbox Locked' or '-ERR [IN-USE] Mailbox Locked' error when trying to log into VPOP3 it means that the mailbox is locked. The POP3 standard requires that POP3 mailboxes have an 'exclusive lock' on them when they are in use. This means that only one POP3 client can access the mailbox at once. Also, if a POP3 mailbox is currently accessing a mailbox, then no IMAP4, Webmail or administrator access is allowed to the mailbox at the s… 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: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 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 2026-03-18T20:20:50+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:how_to?rev=1773865250&do=diff "How To" Articles Installation/Upgrades * Download VPOP3 * Install VPOP3 * Move VPOP3 * Upgrade VPOP3 * Upgrade VPOP3 to version 5.x or 6.x from version 4 or earlier * Upgrade VPOP3 to version 7.x from version 6 or earlier * Upgrade VPOP3 to version 8.x from version 7 or earlier * Upgrade VPOP3 to version 9 or later from version 7 or 8 * Performance Requirements * Installation Checklist General Configuration * Initial Configuration * Users * Add an Alias * Create… text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:how_to_tell_vpop3_some_users_in_the_local_domain_are_not_to_be_handled_by_vpop3?rev=1542192349&do=diff How to tell VPOP3 that some users in the local domain are not to be handled by VPOP3 In some situations you will have a situation where most of your users are handled by VPOP3, but several users will collect their mail directly from a separate POP3 account on your ISP, even though they may have an email address on the same domain as other users. 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 2026-03-26T13:20:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:lost_password?rev=1774531239&do=diff 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:router_problem?rev=1542192349&do=diff Router Problem error messages If you get an error message to the VPOP3 administrator with subject Router Problem and text Local Distribute to <username> Failed Error: Database Error "ERROR: could not open file "base/<number>/<number>": Permission denied" 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 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:user_documents?rev=1542192349&do=diff Spam Filter User Documentation Below is a document which may be useful for providing to users for using the VPOP3 spamfilter as a user (not administrator) spamfilter 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_settings?rev=1542192349&do=diff Web Based Administration VPOP3 is administered through your web browser. You can access the administration settings by going to Start -> Programs -> VPOP3 -> Configure VPOP3 in Windows on the PC where VPOP3 is installed, or by right-clicking on the VPOP3 status monitor icon in the task tray, and choosing text/html 2018-11-14T10:45:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.pscs.co.uk/how_to:vpop3db_service_doesn_t_exist?rev=1542192349&do=diff VPOP3DB Service doesn't exist If VPOP3 v3 or later won't start, and you find that the VPOP3DB (or PostgreSQL-VPOP3) service does not exist in the Windows Services list, it may be that you have just moved VPOP3 and made a mistake following the move procedure or something has removed the service for some reason.