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    <item rdf:about="https://wiki.pscs.co.uk/how_to:vpop3_is_using_a_lot_of_disk_space?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>VPOP3 is using a lot of disk space</title>
        <link>https://wiki.pscs.co.uk/how_to:vpop3_is_using_a_lot_of_disk_space?rev=1542192349&amp;do=diff</link>
        <description>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&#039; messages are stored in the database, so they will occupy space in the VPOP3\pgsql\data folder.</description>
    </item>
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        <dc:format>text/html</dc:format>
        <dc:date>2023-03-25T23:33:31+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Archive Script</title>
        <link>https://wiki.pscs.co.uk/reference:archive_script?rev=1679787211&amp;do=diff</link>
        <description>Archive Script

(from VPOP3 v6 onwards)

Archive scripting lets you indicate whether full message content should be stored in the message archive. This could be used, for instance, for filtering out messages containing credit card details.

The message headers will still be archived, along with the explanation text returned by the script.</description>
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    <item rdf:about="https://wiki.pscs.co.uk/faq:gdpr_hosted_vpop3?rev=1760456581&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2025-10-14T15:43:01+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>GDPR for hosted VPOP3 service</title>
        <link>https://wiki.pscs.co.uk/faq:gdpr_hosted_vpop3?rev=1760456581&amp;do=diff</link>
        <description>GDPR for hosted VPOP3 service

(Since Brexit, the UK has “UK GDPR” instead of “EU GDPR”, so this document refers to UK GDPR)

Also see GDPR for VPOP3 as most of that applies to the VPOP3 hosting service as well.

This Data Processing Agreement is part of our hosted VPOP3 service terms. You can view the revision history by clicking on the &#039;clock&#039; icon to the right.</description>
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        <dc:format>text/html</dc:format>
        <dc:date>2026-01-05T09:31:47+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>VPOP3 re-downloading old messages from the ISP POP3 server</title>
        <link>https://wiki.pscs.co.uk/how_to:vpop3_re-downloading_old_messages_from_isp_pop3_server?rev=1767605507&amp;do=diff</link>
        <description>VPOP3 re-downloading old messages from the ISP POP3 server

If you tell VPOP3&#039;s POP3 mail collector to leave messages on the ISP&#039;s server for a few days,  you may find that sometimes VPOP3 will redownload all the messages from the ISP mailbox again.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/faq:gdpr_other_hosting?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>GDPR for other hosting services (eg web hosting)</title>
        <link>https://wiki.pscs.co.uk/faq:gdpr_other_hosting?rev=1542192349&amp;do=diff</link>
        <description>GDPR for other hosting services (eg web hosting)

As a hosted service provider, we are classed as a “Data Processor” under the GDPR regulations.

For our hosting services:

	*  Data is held in the UK. Data is not transmitted outside of the EU except at your explicit request or command.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:move_the_message_store_-_alternative_method?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Move the message store - alternative method</title>
        <link>https://wiki.pscs.co.uk/how_to:move_the_message_store_-_alternative_method?rev=1542192349&amp;do=diff</link>
        <description>Move the message store - alternative method

This method moves the database data storage location, but not the whole database. This means that the database configuration, logs, transaction logs etc are still stored in the VPOP3\pgsql\data folder, but the actual database tables &amp; indexes are stored in the new location. This may be simpler, but, depending on your requirements,</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/what_is:imap4?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>What is IMAP4</title>
        <link>https://wiki.pscs.co.uk/what_is:imap4?rev=1542192349&amp;do=diff</link>
        <description>What is IMAP4

IMAP4 (Internet Mail Access Protocol V4) is a new mail retrieval protocol which can be used as an alternative to the POP3 (Post Office Protocol V3).

The main difference between IMAP4 and POP3 is that with POP3 the messages are only stored temporarily on the mail server until they are downloaded to the email client where the messages are stored, manipulated, searched etc. With IMAP4 the messages are stored permanently on the server, and they are manipulated, searched etc on the ma…</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/faq:gdpr_for_vpop3?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>GDPR for VPOP3 self-hosted software</title>
        <link>https://wiki.pscs.co.uk/faq:gdpr_for_vpop3?rev=1542192349&amp;do=diff</link>
        <description>GDPR for VPOP3 self-hosted software

VPOP3 is an email server program, it is not a service, so if you use VPOP3 on your own computer we are not a “data controller” or a “data processor” under GDPR rules as we never see any of your data (unless you give us permission to remotely connect to your PC for technical support purposes).</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/faq:what_is_postgresql?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>What is PostgreSQL?</title>
        <link>https://wiki.pscs.co.uk/faq:what_is_postgresql?rev=1542192349&amp;do=diff</link>
        <description>What is PostgreSQL?

PostgreSQL is an SQL database engine.

VPOP3 and PostgreSQL

In VPOP3 2.x, VPOP3 uses a database engine called SQLite for its database needs. SQLite has limited locking facilities, so on busy systems we encountered problems where databases would need very frequent updates, and the lock limitations would cause the updates to take a long time. For this reason we added optional support for PostgreSQL to later versions of VPOP3 2.x.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:vpop3_not_starting_properly?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>VPOP3 Not Starting Properly</title>
        <link>https://wiki.pscs.co.uk/how_to:vpop3_not_starting_properly?rev=1542192349&amp;do=diff</link>
        <description>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&#039;t respond to anything, or it may appear in Task Manager and then stop after a short period.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:attachment_processing_script?rev=1669282143&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2022-11-24T09:29:03+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Attachment Processing Script</title>
        <link>https://wiki.pscs.co.uk/reference:attachment_processing_script?rev=1669282143&amp;do=diff</link>
        <description>Attachment Processing Script

(Added in v7.6)

This script has functions to allow message attachments to be altered:

	*  NeedsRecode
	*  NeedsRewrite
	*  GetRename
	*  GetContentDispositionLine (added in v7.8)
	*  IsLockNeeded
	*  RewriteAttachment</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:calendar_events?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Calendar.Events table</title>
        <link>https://wiki.pscs.co.uk/reference:calendar_events?rev=1542192349&amp;do=diff</link>
        <description>Calendar.Events table

The Calendar.Events table contains a record of all the events in calendars managed by VPOP3.

An &#039;event&#039; is an iCalendar event. Note that if an event is a recurring series, there will only be one &#039;event&#039; in the database, not one event per instance of the recurrence.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:ldap_schema_in_vpop3_4.x?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>LDAP Schema in VPOP3 4.x</title>
        <link>https://wiki.pscs.co.uk/reference:ldap_schema_in_vpop3_4.x?rev=1542192349&amp;do=diff</link>
        <description>LDAP Schema in VPOP3 4.x

Hierarchical Structure

LDAP data is stored as a hierarchical database with the &#039;DN&#039; (Distinguished Name) of the object as the key. The DN is made up of the various &#039;Relative DNs&#039; used to navigate to the desired object, placed in reverse order, separated by commas.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:lua_scripting?rev=1774568941&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2026-03-26T23:49:01+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Lua Scripting</title>
        <link>https://wiki.pscs.co.uk/reference:lua_scripting?rev=1774568941&amp;do=diff</link>
        <description>Lua Scripting

Lua is a simple scripting programming language often used for embedding in other applications. VPOP3 uses it to customise behaviour in places where most people will be happy with the default behaviour, but occasionally people will want to do something more complicated. Rather than having lots of extra options to complicate things for most users, we have opted to go for a more flexible scripting facility.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/faq:encryption?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Encryption</title>
        <link>https://wiki.pscs.co.uk/faq:encryption?rev=1542192349&amp;do=diff</link>
        <description>Encryption

There are several different encryption methods used on the Internet which are relevant to VPOP3.

Current versions of VPOP3 Basic will be able to connect to other POP3 or SMTP servers using either SSL or TLS. This allows you to use VPOP3 to access services such as GMail which require SSL/TLS.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/faq:imap4?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>IMAP4 Mail Protocol</title>
        <link>https://wiki.pscs.co.uk/faq:imap4?rev=1542192349&amp;do=diff</link>
        <description>IMAP4 Mail Protocol

IMAP4 (Internet Mail Access Protocol version 4) is a more advanced protocol than POP3. With IMAP4 your mail is stored and manipulated on the mail server.

So, if you move a message from one folder to the other, the message is moved on the server. If you send a message, your mail client will (usually) put a copy into your &#039;Sent Items&#039; folder. If you delete a message, it is deleted from the server, and so on.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/faq:pop3?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>POP3 Protocol</title>
        <link>https://wiki.pscs.co.uk/faq:pop3?rev=1542192349&amp;do=diff</link>
        <description>POP3 Protocol

POP3 is the most basic email protocol for collecting mail which is in common use.

Almost all email client programs (such as Microsoft Outlook &amp; Outlook Express, Mozilla Thunderbird, etc) can collect mail using POP3.

With POP3, mail is usually downloaded by the email client and stored on the user&#039;s local PC. It is then deleted from the mail server, so the only copy is on the user&#039;s PC. Any mail folders etc are all managed on the user&#039;s PC.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:450_4.3.2_content_filter_timeout?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>450 4.3.2 Content Filter Timeout</title>
        <link>https://wiki.pscs.co.uk/how_to:450_4.3.2_content_filter_timeout?rev=1542192349&amp;do=diff</link>
        <description>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).</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:backup_vpop3?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>How to Backup VPOP3</title>
        <link>https://wiki.pscs.co.uk/how_to:backup_vpop3?rev=1542192349&amp;do=diff</link>
        <description>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&#039;s backup, DBBACK-1.DMP is Monday&#039;s backup, etc).</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:database_maintenance?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Database Maintenance</title>
        <link>https://wiki.pscs.co.uk/how_to:database_maintenance?rev=1542192349&amp;do=diff</link>
        <description>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…</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:database_size?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>VPOP3 Database Size</title>
        <link>https://wiki.pscs.co.uk/how_to:database_size?rev=1542192349&amp;do=diff</link>
        <description>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,…</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:full_text_search?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Full Text Search</title>
        <link>https://wiki.pscs.co.uk/how_to:full_text_search?rev=1542192349&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:imap4?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Using IMAP4 with VPOP3 Enterprise</title>
        <link>https://wiki.pscs.co.uk/how_to:imap4?rev=1542192349&amp;do=diff</link>
        <description>Using IMAP4 with VPOP3 Enterprise

VPOP3 Enterprise supports IMAP4 email clients (VPOP3 Basic does not).

With IMAP4 the email folders and messages are stored on the mail server. The email client then synchronises with the server. Also, unlike with POP3, several things can access the same mailbox at once.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:inbox_size_is_zero_but_mailbox_size_is_not_zero?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Inbox size is zero but mailbox size is not zero</title>
        <link>https://wiki.pscs.co.uk/how_to:inbox_size_is_zero_but_mailbox_size_is_not_zero?rev=1542192349&amp;do=diff</link>
        <description>Inbox size is zero but mailbox size is not zero

In the VPOP3 settings sometimes, on the user account list the “Inbox Count” is shown as zero, but the “Mailbox Size” is not zero.

This is not a bug, or mistake - the two figures are showing different things.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:incoming_smtp_feed?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Incoming SMTP Feed</title>
        <link>https://wiki.pscs.co.uk/how_to:incoming_smtp_feed?rev=1542192349&amp;do=diff</link>
        <description>Incoming SMTP Feed

An incoming SMTP feed is where incoming mail is sent directly to your mail server without going through your ISP&#039;s POP3 mail server on the way. 

Advantages

An incoming SMTP feed has several advantages over going via a POP3 mailbox:</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:internationalisation?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Internationalisation</title>
        <link>https://wiki.pscs.co.uk/how_to:internationalisation?rev=1542192349&amp;do=diff</link>
        <description>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 &#039;=&#039; on each line</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:obtaining_error_logs?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>How to Obtain Error Logs</title>
        <link>https://wiki.pscs.co.uk/how_to:obtaining_error_logs?rev=1542192349&amp;do=diff</link>
        <description>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…</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:repairing_corrupted_database?rev=1705318545&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2024-01-15T11:35:45+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Repairing corrupted database</title>
        <link>https://wiki.pscs.co.uk/how_to:repairing_corrupted_database?rev=1705318545&amp;do=diff</link>
        <description>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&#039;t then there is no manual &#039;repair&#039; function, because the data cannot totally be recovered (or it would automatically have been recovered).</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:restore_folder_-_v5?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Restore selected mail folders or mailbox in VPOP3 v5 or later</title>
        <link>https://wiki.pscs.co.uk/how_to:restore_folder_-_v5?rev=1542192349&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:sending_mail_from_different_email_addresses_or_domains?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Sending mail from different email addresses or domains</title>
        <link>https://wiki.pscs.co.uk/how_to:sending_mail_from_different_email_addresses_or_domains?rev=1542192349&amp;do=diff</link>
        <description>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&#039;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</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:the_message_could_not_be_loaded._please_return_to_the_quarantine_page_and_try_again?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>The message could not be loaded. Please return to the Quarantine page and try again</title>
        <link>https://wiki.pscs.co.uk/how_to:the_message_could_not_be_loaded._please_return_to_the_quarantine_page_and_try_again?rev=1542192349&amp;do=diff</link>
        <description>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</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:undelete?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Undelete Messages in VPOP3 Enterprise v5 or later</title>
        <link>https://wiki.pscs.co.uk/how_to:undelete?rev=1542192349&amp;do=diff</link>
        <description>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 &#039;recycle bin&#039; is set in Settings</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:upgrade_vpop3?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>How To Upgrade VPOP3</title>
        <link>https://wiki.pscs.co.uk/how_to:upgrade_vpop3?rev=1542192349&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:v3_-_move_message_store_folder?rev=1544023524&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-12-05T15:25:24+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>v3/4 - Move the message store to a new folder/drive</title>
        <link>https://wiki.pscs.co.uk/how_to:v3_-_move_message_store_folder?rev=1544023524&amp;do=diff</link>
        <description>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</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:vpop3_status_monitor_problems?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>VPOP3 Status Monitor Problems</title>
        <link>https://wiki.pscs.co.uk/how_to:vpop3_status_monitor_problems?rev=1542192349&amp;do=diff</link>
        <description>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</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:access_restrictions_internal_format?rev=1690964557&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2023-08-02T08:22:37+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Access Restrictions Internal Format</title>
        <link>https://wiki.pscs.co.uk/reference:access_restrictions_internal_format?rev=1690964557&amp;do=diff</link>
        <description>Access Restrictions Internal Format

VPOP3 internally stores service IP Access Restrictions in its settings database using the following format to encode the multiple entries

These are stored in the settings database as *ALLOWED*.DAT (using VPOP3SETTINGS GET *ALLOWED*.DAT will list them)</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:archive_offline?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Message Archive -&gt; Offline Tab</title>
        <link>https://wiki.pscs.co.uk/reference:archive_offline?rev=1542192349&amp;do=diff</link>
        <description>Message Archive -&gt; Offline Tab

Settings -&gt; Message Archive -&gt; Offline Tab.

The Offline tab lets you tell VPOP3 to move old archived messages to an alternative store, such as CD/DVD or external drive etc. VPOP3 will create a ZIP file containing the old messages. The archive index will still remember the messages, and the name of the ZIP file they are contained in, so you will still be able to search for messages on date, sender, subject, etc, but not on the message content.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:attachment_processing?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Settings -&gt; Attachment Processing</title>
        <link>https://wiki.pscs.co.uk/reference:attachment_processing?rev=1542192349&amp;do=diff</link>
        <description>Settings -&gt; Attachment Processing

The Attachment Processing page allows you to configure VPOP3 to perform two distinct functions on messages that contain attachments:

	*  
	*  

Filtering

The Filtering tab is divided into four main sections: 

Attachment Filtering</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:autoresponder_global_script?rev=1774279769&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2026-03-23T15:29:29+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Autoresponder Global Scripting</title>
        <link>https://wiki.pscs.co.uk/reference:autoresponder_global_script?rev=1774279769&amp;do=diff</link>
        <description>Autoresponder Global Scripting

For scripting to modify the autoresponder text which is embedded in the autoresponder itself, see Autoresponder Scripting

The Autoresponder Global Script is executed for every autoresponse. It is stored in the &#039;Autoresponder.lua&#039; script in Settings → Scripts</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:calendar?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Calendar database schema</title>
        <link>https://wiki.pscs.co.uk/reference:calendar?rev=1542192349&amp;do=diff</link>
        <description>Calendar database schema

The Calendar database schema contains the data for the Calendar/CalDAV component of VPOP3.

Note that the actual calendar data is stored in iCalendar/.ics file format. The database just stores information for helping with selective retrieval.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:database_backups?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Database -&gt; Backups Tab</title>
        <link>https://wiki.pscs.co.uk/reference:database_backups?rev=1542192349&amp;do=diff</link>
        <description>Database -&gt; Backups Tab

The Backups tab lets you specify how VPOP3 will make its daily backup of its database.

We strongly recommend that you backup the database regularly in case of disk problems or file corruption. You can use the VPOP3 backup feature, or manually backup the PostgreSQL database using the pg_dump command, or use another program to backup the PostgreSQL database if you wish. Note that a simple disk copy will</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:database_message_store?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Database -&gt; Message Store Tab</title>
        <link>https://wiki.pscs.co.uk/reference:database_message_store?rev=1542192349&amp;do=diff</link>
        <description>Database -&gt; Message Store Tab

This tab says how VPOP3 handles its message store

Message Store

The Delay while moving messages setting tells VPOP3 how quickly to import messages into the new database structure if it was upgraded from version 2.x or earlier. Usually this is OK to be left as it is, but if there is some special requirement to import the messages more quickly, you can decrease this number, but that will increase the load on the server.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:database_restore?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Database -&gt; Restore Tab</title>
        <link>https://wiki.pscs.co.uk/reference:database_restore?rev=1542192349&amp;do=diff</link>
        <description>Database -&gt; Restore Tab

This tab is only in VPOP3 Enterprise (v5 and later), and is for performing a partial (mailbox/mail folder) restore of the database. To do a full restore of the database, or for VPOP3 Basic/Standard, see the “Restore a Backup of VPOP3” topic

Using the</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:database_schema_used_in_vpop3_5.x?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Database schema used in VPOP3 5.x</title>
        <link>https://wiki.pscs.co.uk/reference:database_schema_used_in_vpop3_5.x?rev=1542192349&amp;do=diff</link>
        <description>Database schema used in VPOP3 5.x

Note that all information in this section is subject to change. We do not guarantee that the database schema will remain constant, even between minor upgrade versions, so use this information at your own risk.

Do not alter the database schema used by VPOP3 (including indexes, triggers &amp; functions) or your whole VPOP3 data store may collapse.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:diagnostics?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Settings -&gt; Diagnostics</title>
        <link>https://wiki.pscs.co.uk/reference:diagnostics?rev=1542192349&amp;do=diff</link>
        <description>Settings -&gt; Diagnostics

The Diagnostics page allows you to enable, configure and disable various methods of diagnostic logging, within VPOP3.

Log file overview

By default, VPOP3 will keep two copies of most log files:

	*  The current log file, with a</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:dmarc_reporter_script?rev=1699782700&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2023-11-12T09:51:40+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>DMARC Reporter Script</title>
        <link>https://wiki.pscs.co.uk/reference:dmarc_reporter_script?rev=1699782700&amp;do=diff</link>
        <description>DMARC Reporter Script

(from VPOP3 v8.6 onwards)

This script lets you customise how VPOP3 sends DMARC reports to the sending domain. This can be useful in case the sending domain&#039;s DMARC configuration is incorrect as that can cause errors sending the reports or cause messages to be &#039;stuck&#039; in VPOP3&#039;s Outqueue. These problems won&#039;t cause any lasting damage, but may be inconvenient or annoying, so you can alter the behaviour using Lua scripting</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:lan_forwarding_script?rev=1755706120&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2025-08-20T16:08:40+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>LAN Forwarding Scripting</title>
        <link>https://wiki.pscs.co.uk/reference:lan_forwarding_script?rev=1755706120&amp;do=diff</link>
        <description>LAN Forwarding Scripting

(Added in V8.7)

This is stored in the &#039;LanForwarding.lua&#039; script in Settings -&gt; Scripts

Pre-send

These functions are called before the message is placed in the LAN Forwarding queue

There are two global variables set:

	*</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:lua_smtp_server_script?rev=1746692615&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2025-05-08T08:23:35+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>SMTP Server Lua Scripting</title>
        <link>https://wiki.pscs.co.uk/reference:lua_smtp_server_script?rev=1746692615&amp;do=diff</link>
        <description>SMTP Server Lua Scripting

The SMTP Server Lua Script is called SMTPSVR.LUA and can be edited from the Settings -&gt; Scripts page in the VPOP3 settings. This script is called whenever an instance of the VPOP3 SMTP server is launched - ie whenever someone opens a connection to port 25 on the VPOP3 server to send it a message, whether from a local user or an incoming SMTP message.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:mail_tab?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Mail tab</title>
        <link>https://wiki.pscs.co.uk/reference:mail_tab?rev=1542192349&amp;do=diff</link>
        <description>Mail tab

The Mail tab within VPOP3 webmail enables you to manage your sent and received messages.

As you can see from the screenshot, the page is divided into three main sections:
Menu bar    General tab bar          Status bar  
[Mail tab - VPOP3 Version 5 Webmail]

Page structure

Mail toolbar

The Mail toolbar contains the following buttons:</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:message_archive?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Message Archive</title>
        <link>https://wiki.pscs.co.uk/reference:message_archive?rev=1542192349&amp;do=diff</link>
        <description>Message Archive

The Message Archive facility is for VPOP3 to store copies of all messages sent or received. It stores the messages in a central archive store which can be searched by an administrator.
The prime purpose of the archive facility is for recording messages in case of possible disputes, as you can see what was sent/received by email. It can also be used as a backup/restore facility in an emergency, but that is not its prime purpose, so it is better to have a proper</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:outgoing_message_script?rev=1711018194&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2024-03-21T10:49:54+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Outgoing Message Scripting</title>
        <link>https://wiki.pscs.co.uk/reference:outgoing_message_script?rev=1711018194&amp;do=diff</link>
        <description>Outgoing Message Scripting

Every time VPOP3 adds a message to the Outgoing mail queue, it runs a script called outmessage.lua.

Scripts are stored as files in the VPOP3 directory in VPOP3 v6.6 and earlier, or managed through the Settings -&gt; Scripts page in VPOP3 v6.7 and later.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:password_strength_checking_script?rev=1767605139&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2026-01-05T09:25:39+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Password Strength Checking Script</title>
        <link>https://wiki.pscs.co.uk/reference:password_strength_checking_script?rev=1767605139&amp;do=diff</link>
        <description>Password Strength Checking Script

You can tell VPOP3 to enforce password strength checks by using a Lua script which performs the checks for you.

The Lua script can be edited in Settings -&gt; Scripts and is called passwordcheck.lua (in older versions of VPOP3 it is stored in a file called</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:reset_message_folder_counts?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Reset Message Folder Counts</title>
        <link>https://wiki.pscs.co.uk/reference:reset_message_folder_counts?rev=1542192349&amp;do=diff</link>
        <description>Reset Message Folder Counts

In extremely rare cases, the mail folder message counts in the database may get out of step with the actual stored messages. There are database triggers which will keep the counts in sync during normal operation, but if you have to manipulate the database directly (eg to recover from a corrupted database) it is possible that they will get out of step.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:scheduler_script?rev=1628506507&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2021-08-09T10:55:07+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Scheduled Task Script</title>
        <link>https://wiki.pscs.co.uk/reference:scheduler_script?rev=1628506507&amp;do=diff</link>
        <description>Scheduled Task Script

Note that this functionality is only available in VPOP3 Enterprise

VPOP3 Enterprise can run Lua script periodically to do custom background tasks. It can run a function every minute, 5 minutes, hourly or daily.

The Lua script is stored in a file called</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:signature_script?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Signature Script</title>
        <link>https://wiki.pscs.co.uk/reference:signature_script?rev=1542192349&amp;do=diff</link>
        <description>Signature Script

If you want more complex signatures on outgoing emails, rather than the static text/HTML you can define within VPOP3, then you can use a simple Lua script to define the signature.

The Lua script is stored in a file called signature.lua</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:spamfilter_whitelist?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Spamfilter.Whitelist table</title>
        <link>https://wiki.pscs.co.uk/reference:spamfilter_whitelist?rev=1542192349&amp;do=diff</link>
        <description>Spamfilter.Whitelist table

The Spamfilter.Whitelist table contains the spamfilter whitelist entries which do not contain wildcards or regular expressions. They are separated out to speed up checking.

Columns

	*  address - this is the email address in the whitelist</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:spamrules_statement_reject?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Spam Filter Rules: Reject</title>
        <link>https://wiki.pscs.co.uk/reference:spamrules_statement_reject?rev=1542192349&amp;do=diff</link>
        <description>Spam Filter Rules: Reject
Statement  Reject Version  2.4.5+ Purpose  Perform an SMTP &#039;Reject&#039; on the incoming message 
The Reject statement requires an error code/text string, in the format
Reject &lt;error string&gt;
This will reject the current SMTP message with the specified SMTP result code. Use a 4xx error code (eg 450) to reject the message temporarily, or a 5xx error code (eg 550) to reject the message permanently.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/reference:whats_new_in_version_5_webmail?rev=1542192349&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>What&#039;s new in version 5 webmail?</title>
        <link>https://wiki.pscs.co.uk/reference:whats_new_in_version_5_webmail?rev=1542192349&amp;do=diff</link>
        <description>What&#039;s new in version 5 webmail?

This is a list of some of the most noticeable changes to VPOP3&#039;s webmail interface for version 5. For a more detailed list of changes, view our bugtracker.

[VPOP3 Version 5 - mobile compatible webmail]

Mobile compatible webmail

If you access version 5 webmail from a mobile device, you will probably be redirected to the mobile compatible version. It is a cut-down version of Webmail, which retains the key features, but doesn&#039;t utilise the extra features which w…</description>
    </item>
</rdf:RDF>
