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        <title>PSCS Wiki</title>
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    <item rdf:about="https://wiki.pscs.co.uk/how_to:error_messages?rev=1759764097&amp;do=diff">
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        <dc:date>2025-10-06T15:21:37+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Error Messages</title>
        <link>https://wiki.pscs.co.uk/how_to:error_messages?rev=1759764097&amp;do=diff</link>
        <description>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</description>
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        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Error Message Handling</title>
        <link>https://wiki.pscs.co.uk/how_to:error_message_handling?rev=1542192349&amp;do=diff</link>
        <description>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&#039;s an underlying problem which needs resolving rather than ignoring.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:performance_requirements?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>Performance Requirements</title>
        <link>https://wiki.pscs.co.uk/how_to:performance_requirements?rev=1542192349&amp;do=diff</link>
        <description>Performance Requirements

The performance requirements for VPOP3 depends on many factors, so we can&#039;t give specific details for any scenario.

How to detect limiting factors

	*  Use the Windows Performance Monitor (perfmon.msc)
	*  Add counters for:</description>
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        <dc:date>2018-11-14T10:45:49+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Socket Error 10053 - An established connection was aborted by the software in your host machine.</title>
        <link>https://wiki.pscs.co.uk/how_to:10053?rev=1542192349&amp;do=diff</link>
        <description>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:</description>
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        <dc:date>2019-02-06T17:10:31+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>PostgreSQL Replication</title>
        <link>https://wiki.pscs.co.uk/how_to:postgresql_replication?rev=1549473031&amp;do=diff</link>
        <description>PostgreSQL Replication

PostgreSQL 9.1 (used in VPOP3 5 and later) supports replication from a &#039;Master&#039; to a &#039;Slave&#039; database server. This can be used with VPOP3 for having a near-realtime backup of your settings &amp; 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…</description>
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    <item rdf:about="https://wiki.pscs.co.uk/how_to:write_your_own_spam_filter_rules?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 write your own spam filter rules</title>
        <link>https://wiki.pscs.co.uk/how_to:write_your_own_spam_filter_rules?rev=1542192349&amp;do=diff</link>
        <description>How to write your own spam filter rules

VPOP3&#039;s spam filter uses a basic scripting language designed for filtering email messages, so a full description of writing your own rules would be very long and complex, as it is really something that only a programmer should do.</description>
    </item>
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        <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>Socket Error 10061 - The attempt to connect was forcefully rejected</title>
        <link>https://wiki.pscs.co.uk/how_to:10061?rev=1542192349&amp;do=diff</link>
        <description>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:</description>
    </item>
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        <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>Socket Error 10503 - No More Data</title>
        <link>https://wiki.pscs.co.uk/how_to:10503?rev=1542192349&amp;do=diff</link>
        <description>Socket Error 10503 - No More Data

Error 10503 means that the connection between VPOP3 and a remote computer (normally your ISP) was dropped at an unexpected time. This is different from the error 10054 in that this is a controlled line drop.

One way this can happen is if the ISP&#039;s POP3 server uses an obsolete standard which allows it to drop the connection if a POP3 &#039;LIST&#039; command is performed on an empty mailbox. The current standard requires that the connection is not dropped until the clien…</description>
    </item>
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        <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>Seeing where a message came from</title>
        <link>https://wiki.pscs.co.uk/how_to:seeing_where_a_message_came_from?rev=1542192349&amp;do=diff</link>
        <description>Seeing where a message came from

Sometimes you need to check to see where a message really came from. The &#039;From:&#039; 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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:your_connection_has_been_blocked_temporarily_-_try_again_later?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>Error message: Your connection has been blocked temporarily - Try again later</title>
        <link>https://wiki.pscs.co.uk/how_to:your_connection_has_been_blocked_temporarily_-_try_again_later?rev=1542192349&amp;do=diff</link>
        <description>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</description>
    </item>
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        <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>Socket Error 10054 - The virtual circuit was reset by the remote end</title>
        <link>https://wiki.pscs.co.uk/how_to:10054?rev=1542192349&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:10055?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>Socket Error 10055 - No Buffer Space Available</title>
        <link>https://wiki.pscs.co.uk/how_to:10055?rev=1542192349&amp;do=diff</link>
        <description>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</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:configure_srs?rev=1755530891&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2025-08-18T15:28:11+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Configure SRS</title>
        <link>https://wiki.pscs.co.uk/how_to:configure_srs?rev=1755530891&amp;do=diff</link>
        <description>Configure SRS

In VPOP3 8.8 and later, you can use Lua scripting to implement &#039;SRS&#039; (Sender Rewriting Scheme&#039;) in VPOP3

This involves adding a couple of functions to rewrite outgoing return paths in &#039;relayout.lua&#039; or &#039;mxout.lua&#039; as appropriate and a couple of functions to redirect rewritten bounce message recipients in &#039;smtpsvr.lua&#039;</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:don_t_download_big_messages_during_the_working_day?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>Don&#039;t download big messages during the working day using Download Rules</title>
        <link>https://wiki.pscs.co.uk/how_to:don_t_download_big_messages_during_the_working_day?rev=1542192349&amp;do=diff</link>
        <description>Don&#039;t download big messages during the working day using Download Rules

Say you don&#039;t want to download messages over 10,000,000 bytes long between 8:00am and 6:00pm. To do this, create a download rule as:

	*  Rule Type: Ignore
	*  Match Type: All Conditions</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:whitelist_blacklist?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 &amp; Blacklist</title>
        <link>https://wiki.pscs.co.uk/how_to:whitelist_blacklist?rev=1542192349&amp;do=diff</link>
        <description>Spamfilter Whitelist &amp; 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 -&gt; Spamfilter -&gt;</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:1068_-_the_dependency_service_or_group_failed_to_start?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>Error 1068 - the dependency service or group failed to start</title>
        <link>https://wiki.pscs.co.uk/how_to:1068_-_the_dependency_service_or_group_failed_to_start?rev=1542192349&amp;do=diff</link>
        <description>Error 1068 - the dependency service or group failed to start

If you get an error 1068 when you try to start VPOP3, then this usually means that the VPOP3DB service (if you are using VPOP3 v5 and later) did not start. In this case try starting that service manually and see what error message is generated then.</description>
    </item>
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        <dc:format>text/html</dc:format>
        <dc:date>2019-11-13T15:35:55+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>1069 or 7000 Login Failure error when starting VPOP3DB service</title>
        <link>https://wiki.pscs.co.uk/how_to:1069_-_login_failure_-_error_when_starting_vpop3db_service?rev=1573659355&amp;do=diff</link>
        <description>1069 or 7000 Login Failure error when starting VPOP3DB service

A 1069 or 7000 login failure error when starting the VPOP3DB service usually means that something is &#039;wrong&#039; with the vpop3postgres account in Windows - the password may have expired, or someone may have reset the password.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:10047?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>Socket Error 10047 - Addresses in the specified family cannot be used with this socket</title>
        <link>https://wiki.pscs.co.uk/how_to:10047?rev=1542192349&amp;do=diff</link>
        <description>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:</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:10048?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>Socket Error 10048 - Specified Address Already in Use</title>
        <link>https://wiki.pscs.co.uk/how_to:10048?rev=1542192349&amp;do=diff</link>
        <description>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</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:10049?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>Socket Error 10049 - The specified address is not available from the local computer</title>
        <link>https://wiki.pscs.co.uk/how_to:10049?rev=1542192349&amp;do=diff</link>
        <description>Socket Error 10049 - The specified address is not available from the local computer

This error normally means that you have entered an invalid address on the IP Address to Bind To entries on the Services page in the VPOP3 settings.

The addresses entered here should be either</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:10060?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>Socket Error 10060 - Operation Timed Out</title>
        <link>https://wiki.pscs.co.uk/how_to:10060?rev=1542192349&amp;do=diff</link>
        <description>Socket Error 10060 - Operation Timed Out

This error is quite self explanatory. It means that Windows reported that a connection attempt or idle connection timed out.

If this error occurs during a connection attempt (eg in a VPOP3 - SMTP Client connection problem error message), then it means that Windows couldn&#039;t connect to the ISP mail server within a fixed time (the timeout limit is fixed within Windows itself). This problem can either mean that your ISP is having a problem, that you are con…</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:delete_outqueue_messages_directly_from_the_database?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>Delete OutQueue messages directly from the database</title>
        <link>https://wiki.pscs.co.uk/how_to:delete_outqueue_messages_directly_from_the_database?rev=1542192349&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:install_vpop3?rev=1615200520&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2021-03-08T10:48:40+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>How to Install VPOP3</title>
        <link>https://wiki.pscs.co.uk/how_to:install_vpop3?rev=1615200520&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:internet_explorer_10_issues?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>Internet Explorer 10 Issues</title>
        <link>https://wiki.pscs.co.uk/how_to:internet_explorer_10_issues?rev=1542192349&amp;do=diff</link>
        <description>Internet Explorer 10 Issues

If you are using IE10 with VPOP3 prior to v6.2, then you may have issues accessing the VPOP3 Webmail and/or admin settings. These can usually be solved by telling IE10 to use &#039;compatibility mode&#039;.

Alternatively, using another web browsers such as</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:restricting_number_of_email_recipients_sent?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>Restricting the number of recipients sent to</title>
        <link>https://wiki.pscs.co.uk/how_to:restricting_number_of_email_recipients_sent?rev=1542192349&amp;do=diff</link>
        <description>Restricting the number of recipients sent to

Some ISPs set restrictions on the number of recipients that you are allowed to send in a certain time period, eg 50 messages per hour, or the number of recipients that you are allowed to send per message or per connection.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:upgrade_vpop3_to_version_7?rev=1593427438&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2020-06-29T10:43:58+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>How to upgrade VPOP3 to version 7 or later from version 6 or earlier</title>
        <link>https://wiki.pscs.co.uk/how_to:upgrade_vpop3_to_version_7?rev=1593427438&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:upgrade_vpop3_to_version_8?rev=1599145654&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2020-09-03T15:07:34+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Upgrading VPOP3 to version 8.x from v7 or earlier</title>
        <link>https://wiki.pscs.co.uk/how_to:upgrade_vpop3_to_version_8?rev=1599145654&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:vpop3_historical_logger_backlog?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 Historical Logger Backlog</title>
        <link>https://wiki.pscs.co.uk/how_to:vpop3_historical_logger_backlog?rev=1542192349&amp;do=diff</link>
        <description>VPOP3 Historical Logger Backlog

This problem is primarily related to VPOP3 versions 2.5 -&gt; 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</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:vpop3_sending_high_volumes_of_unrecognised_mails?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>SMTP Relay Protection in VPOP3</title>
        <link>https://wiki.pscs.co.uk/how_to:vpop3_sending_high_volumes_of_unrecognised_mails?rev=1542192349&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:421_4.3.2_vpop3_smtp_server_access_disabled_-_content_scanner_problem?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>421 4.3.2 VPOP3 SMTP Server access disabled - content scanner problem!</title>
        <link>https://wiki.pscs.co.uk/how_to:421_4.3.2_vpop3_smtp_server_access_disabled_-_content_scanner_problem?rev=1542192349&amp;do=diff</link>
        <description>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&#039;t automatically recover from. This may be a fatal error, or a licencing issue.

You can check this on the Settings</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:552_5.2.3_message_too_large_-_contact_your_administrator?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>552 5.2.3 Message too large - contact your administrator</title>
        <link>https://wiki.pscs.co.uk/how_to:552_5.2.3_message_too_large_-_contact_your_administrator?rev=1542192349&amp;do=diff</link>
        <description>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.</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:calendar_in_mozilla_lightning?rev=1643194055&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2022-01-26T10:47:35+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>Calendars in Mozilla Thunderbird</title>
        <link>https://wiki.pscs.co.uk/how_to:calendar_in_mozilla_lightning?rev=1643194055&amp;do=diff</link>
        <description>Calendars in Mozilla Thunderbird

The Thunderbird email client supports CalDAV calendars as standard. This can be used to access VPOP3&#039;s CalDAV server.

To add a VPOP3 CalDAV calendar to Mozilla Thunderbirdis straightforward

	*  Add the calendar to Thunderbird</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:data_stream_contained_nul_character?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>Data stream contained NUL character</title>
        <link>https://wiki.pscs.co.uk/how_to:data_stream_contained_nul_character?rev=1542192349&amp;do=diff</link>
        <description>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</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:error_sending_message_after_authentication?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>&quot;Error Sending Message After Authentication&quot; in Webmail</title>
        <link>https://wiki.pscs.co.uk/how_to:error_sending_message_after_authentication?rev=1542192349&amp;do=diff</link>
        <description>&quot;Error Sending Message After Authentication&quot; in Webmail

If you get an error while sending a message using Webmail, such as

“Error sending message after authentication - error 0 - text 502 Error: command not implemented”

this means that you have another SMTP server running on the VPOP3 computer, and when the VPOP3 Webmail service tries to send the message it is sending it to this other SMTP server, rather than to the VPOP3 server. The Webmail service uses internal commands which the other SMTP…</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:exchange_2003?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>Setting up VPOP3 to work with Exchange 2003</title>
        <link>https://wiki.pscs.co.uk/how_to:exchange_2003?rev=1542192349&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:exchange_2007?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>Exchange 2007</title>
        <link>https://wiki.pscs.co.uk/how_to:exchange_2007?rev=1542192349&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:general_configuration_tasks?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>Initial Configuration Tasks</title>
        <link>https://wiki.pscs.co.uk/how_to:general_configuration_tasks?rev=1542192349&amp;do=diff</link>
        <description>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 &#039;VPOP3 Settings&#039;. (If that doesn&#039;t work, see this article to troubleshoot Status Monitor problems). Alternatively, on the VPOP3 PC, you can go to Start</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:how_to?rev=1773865250&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2026-03-18T20:20:50+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>&quot;How To&quot; Articles</title>
        <link>https://wiki.pscs.co.uk/how_to:how_to?rev=1773865250&amp;do=diff</link>
        <description>&quot;How To&quot; 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…</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:install_to_external_pgsql?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>Install VPOP3 using external PostgreSQL database</title>
        <link>https://wiki.pscs.co.uk/how_to:install_to_external_pgsql?rev=1542192349&amp;do=diff</link>
        <description>Install VPOP3 using external PostgreSQL database

(VPOP3 version 5 or later)

In some cases, advanced users may wish to have VPOP3 use an external PostgreSQL database instead of the one installed with VPOP3. This is possible by telling VPOP3 the connection details during installation.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:installation_errors?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>Installation Errors</title>
        <link>https://wiki.pscs.co.uk/how_to:installation_errors?rev=1542192349&amp;do=diff</link>
        <description>Installation Errors

This page lists some errors which may occur during installation and the solution.

In general, do NOT &#039;ignore&#039; any errors unless we tell you to.

If you have to retry an installation, when it is an upgrade from versions 1 - 4 going to version 5 or later, then make sure you have told the installer to install the database. Sometimes a partial installation will make the installer think that the database is already installed.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:messages_being_put_into_an_unwanted_folder?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>Messages being put into an &#039;Unwanted&#039; folder</title>
        <link>https://wiki.pscs.co.uk/how_to:messages_being_put_into_an_unwanted_folder?rev=1542192349&amp;do=diff</link>
        <description>Messages being put into an &#039;Unwanted&#039; folder

If incoming messages are being put into a folder called &#039;Unwanted&#039; this may be due to the default Samsung Galaxy mail client&#039;s spam filtering.

See: &lt;http://exchangeitup.blogspot.co.uk/2014/10/exchange-2010-extra-junk-or-unwanted.html&gt;</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:outlook_outlook_express_are_sending_mail_repeatedly?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>Outlook / Outlook Express is sending mail repeatedly</title>
        <link>https://wiki.pscs.co.uk/how_to:outlook_outlook_express_are_sending_mail_repeatedly?rev=1542192349&amp;do=diff</link>
        <description>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</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:problems_sending_mail_via_bt_from_your_own_domain?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>Problems sending mail via BT from your own domain</title>
        <link>https://wiki.pscs.co.uk/how_to:problems_sending_mail_via_bt_from_your_own_domain?rev=1542192349&amp;do=diff</link>
        <description>Problems sending mail via BT from your own domain

BT Internet only allow you to send mail through their mail servers from your BT Internet address or other registered address. Attempts to send from other addresses will give you a 553 SMTP error message.</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:restricting_number_of_messages_sent?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>Restricting the number of messages sent</title>
        <link>https://wiki.pscs.co.uk/how_to:restricting_number_of_messages_sent?rev=1542192349&amp;do=diff</link>
        <description>Restricting the number of messages sent

Some ISPs set restrictions on the number of messages that you are allowed to send in a certain time period, eg 50 messages per hour, or the number of messages that you are allowed to send per connection.

Restriction of messages per connection</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:sender_policy_framework?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>Sender Policy Framework / SPF</title>
        <link>https://wiki.pscs.co.uk/how_to:sender_policy_framework?rev=1542192349&amp;do=diff</link>
        <description>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 &#039;spoofing&#039; 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&#039;t come from an authorised IP address.</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:too_many_logins?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>&quot;Too many logins&quot; error message</title>
        <link>https://wiki.pscs.co.uk/how_to:too_many_logins?rev=1542192349&amp;do=diff</link>
        <description>&quot;Too many logins&quot; error message

VPOP3 version 4 and later have a limit on the number of concurrent logins which can be received for a single user or from a single IP address. This is to prevent a single user from bringing the server down.

The current default limits are 20 per user, or 1000 per IP address (to allow multiple people sharing a NAT IP address)</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:total_rebuild_of_database?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>Total Rebuild of Database</title>
        <link>https://wiki.pscs.co.uk/how_to:total_rebuild_of_database?rev=1542192349&amp;do=diff</link>
        <description>Total Rebuild of Database

If you suspect database corruption, sometimes the best thing to do is to totally rebuild the database. This involves six steps:

	*  Stop VPOP3
	*  Backup Database
	*  Delete Database
	*  Re-create Database
	*  Restore/Create Database</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:upgrade_vpop3_to_version_5?rev=1573227472&amp;do=diff">
        <dc:format>text/html</dc:format>
        <dc:date>2019-11-08T15:37:52+00:00</dc:date>
        <dc:creator>Anonymous (anonymous@undisclosed.example.com)</dc:creator>
        <title>How To Upgrade VPOP3 to version 5 or later</title>
        <link>https://wiki.pscs.co.uk/how_to:upgrade_vpop3_to_version_5?rev=1573227472&amp;do=diff</link>
        <description>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.</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:vpop3_cannot_access_postgresql_-_timeout_expired?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 cannot access PostgreSQL - timeout expired</title>
        <link>https://wiki.pscs.co.uk/how_to:vpop3_cannot_access_postgresql_-_timeout_expired?rev=1542192349&amp;do=diff</link>
        <description>VPOP3 cannot access PostgreSQL - timeout expired

This is an error which may be logged in the Windows event log

It is event 4547 from the source &#039;VPOP3&#039;

If the event message DLL is not correctly installed it may display as:
The description for Event ID ( 4547 ) in Source ( VPOP3 ) cannot be found. The local computer
may not have the necessary registry information or message DLL files to display messages 
from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this 
desc…</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:vpop3_is_responding_slowly?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 Responding Slowly</title>
        <link>https://wiki.pscs.co.uk/how_to:vpop3_is_responding_slowly?rev=1542192349&amp;do=diff</link>
        <description>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&#039;t need defragmenting even if it does, so it is best to do it anyway. Also, there is a better free defragmenter available called</description>
    </item>
    <item rdf:about="https://wiki.pscs.co.uk/how_to:vpop3_xxxxx_server_access_not_allowed?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 Server Access Not Allowed</title>
        <link>https://wiki.pscs.co.uk/how_to:vpop3_xxxxx_server_access_not_allowed?rev=1542192349&amp;do=diff</link>
        <description>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&#039;s IP Access Restrictions defined in VPOP3 do not allow access from your client computer.</description>
    </item>
</rdf:RDF>
