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Service status - resolved
Posted by Paul Smith on 27 September 2016 09:54 AM

11:25 - everything should be running again now. The power failure didn't affect our servers directly, but appears to have disrupted the Internet connectivity of the data centre, so our servers were inaccessible.

10:48 - Our data centre has just has a power equipment failure issue which is affecting our servers

The data centre status can be viewed at:

Unfortunately, we do not know more than this. From past experience with the data centre it should be resolved relatively quickly, at which time we will have to test all our servers if they had lost their power.

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VPOP3 v7 upcoming & beta-testers wanted
Posted by Paul Smith on 22 June 2016 08:53 AM

The next version of VPOP3 that we are planning will be version 7. We are changing from the 6.x sequence because we are planning two relatively major changes:

  1. Change from PostgreSQL 9.1 to 9.5
  2. Release 64 bit version of VPOP3

People with active support/maintenance agreements at the time of its release will be able to upgrade to version 7 as part of that agreement.

We are anticipating release around late September 2016.

Change from PostgreSQL 9.1 to 9.5

PostgreSQL 9.1 is nearing end-of-life in September 2016. While we haven’t encountered any major problems with it, there are many improvements in later versions of PostgreSQL which will help performance and also make some things that VPOP3 does easier.

VPOP3 already runs on any version of PostgreSQL from 9.1 or later, but it is quite a major process to upgrade the major version of PostgreSQL. This is why we have not previously kept up with the latest versions of PostgreSQL in our standard installation process.

When going from VPOP3 v3/4 (which used PostgreSQL 8.3) to v5/6 (which uses 9.1) we had to backup & restore the full database which could take several hours for some users. This was required because the build method of the pre-built PostgreSQL binaries had changed between 8.3 and 9.1.

However, the build method of 9.5 is compatible with that of 9.1, so we can use a ‘shortcut’ method using a program called pg_upgrade. When we have tested it here, it takes just a few minutes to upgrade a 30GB v9.1 database to v9.5. It is slightly complex so we will be trying to automate it for you.

One of the ‘disadvantages’ of using pg_upgrade is that we cannot convert the database to work with a 64 bit version of PostgreSQL, so we will have to stick with a 32 bit version of PostgreSQL even for the 64 bit version of VPOP3. We don’t anticipate this being a problem. If you want to use a 64 bit version of PostgreSQL, that will work fine with VPOP3, but you will still have to do the full dump/restore process to migrate the database in that case. This won’t be part of the standard installation procvess.

Release 64 bit version of VPOP3

For a while we’ve been wanting to release a 64 bit version of VPOP3. Tests we’ve done show our 64 bit builds working fine. There are a few limitations with the 64 bit version we are working with so far:

  • it requires Windows 2008/Vista or later (not that big a problem since 64 bit versions of Windows XP were rare)
  • it doesn’t support the standalone fax plugin (but will support the PAYG fax service)
  • it doesn’t support WebMail spellchecking (we may look at trying to re-add this if there is enough interest)
  • it doesn’t support the VPOP3AV antivirus plugin. We will be working on this (we don’t anticipate any problems implementing this, it’s just a lack of time so far)

(The above are mostly not because of any problems with the 64 bit VPOP3, but because we use third party components for which we do not have 64 bit versions, so adding them will incur extra licensing costs for us).

The 64 bit version of VPOP3 should alleviate some problems we have encountered in a few cases.

The main one is that problems due to virtual address space fragmentation should be practically eliminated. This problem has caused issues when people have tried to have VPOP3 process very large emails (>100MB).

VPOP3 will also have access to more than 3GB of memory. This shouldn’t solve any existing problems by itself, but it does mean we can consider adding more in-memory caching for some data to improve performance.

Beta testers wanted

Because of these relatively major changes we would like some people to try it out before release. Please contact us via if you are interested in this. We will be testing it on our internal mail servers and test PCs first, but it is good to try it in different environments as well.

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New forum now open
Posted by Paul Smith on 21 June 2016 01:22 PM

We have just set up a new forum at

This is for suggestions, bug reports and general support for our VPOP3 software and other services.

There is an area for assisted technical support for VPOP3 6.x and another area for peer help for earlier versions.

The login details are the same as for our helpdesk, so if you have ever contacted us through our helpdesk or by email then you will probably have an account already. Use your email address and password to log on. Use the Forgot Your Password link if you don’t know your password.

Please come along and join in.

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VPOP3 v6.20 released
Posted by Paul Smith on 08 June 2016 01:09 PM

We have just released VPOP3 v6.20 which you can download from

This is a free upgrade for all users who have active software maintenance or priority support on 8th June 2016. Other users can purchase the upgrade and 1 year of software maintenance on our website.

The full change log can be viewed in our issue tracker.

Main Changes in v6.20

  • New: Have system ‘message’ system on Dashboard
  • New: Have VPOP3 optionally submit sender stats to us for analysis and reputation tracking
  • New: In attachment extraction allow directory expansion by sender/recipient(s)
  • New: Add attachment filter option to send messages to quarantine
  • New: Add report for the biggest folders
  • New: Allow different header mods for different users from Spamfilter
  • New: Have options to reject messages immediately on SPF fail rather than going through spam filter
  • New: Add greylisting option to bypass on SPF check
  • New: Show status of archive folder move operations
  • New: When editing schedule allow selection of Connections from edit box
  • New: Show more details of running tasks on server status page
  • New: Display last time VPOP3 checked for Spamfilter updates in settings
  • New: Add viewers for transcript logs to diagnostics settings page
  • New: Be able to cancel offline backup actions
  • New: Offline archive ZIP maker – option to add more messages at once
  • New: Offline archive ZIP maker – option for ‘inaccurate size’ to improve performance
  • New: Offline archive ZIP maker – option for ‘number of messages’ limit instead of size
  • New: Run optional command every time a message gets added to the archive
  • New: Have FTP uploader for archived messages
  • New: Handle restart of archive folder move operations better
  • New: Support Lua script on mail delivery to perform similar to Message Rules
  • New: Lua script for SMTP Rules
  • New: Add SMTP Rule action to block IP address
  • New: With SMTP Rules allow multiple recipients to be specified in a redirect/copy
  • New: SMTP Rule to alter headers
  • Fix: Diagnostics Message search not searching deleted messages
  • Fix: VPOP3 crashing on invalid IMAP search
  • Fix: Can’t block IP addresses for >999 minutes
  • Fix: ‘Change Internet Reply Address’ option is not changing return path
  • Fix: Bayesian data not being loaded into memory correctly in a running system, so ‘term’ count doesn’t update correctly
  • Fix: Bayesian database data not always being correctly logged for ‘spam’ messages, reducing effectiveness
  • Fix: Settings -> Diagnostics page doesn’t always open in VPOP3 Basic
  • Fix: LAN forwarding could get ‘stuck’ if there was a persistently failing receiving server
  • Fix: In Chrome, Webmail quarantine date list doesn’t stay open if browser window too small
  • Fix: Message Rules are being processed when messages are released from quarantine
  • Fix: Offline Archiving error messages not always reported correctly
  • Fix: SSL Cert chain validation isn’t working properly
  • Fix: Fix SPF checker ‘redirect=’ modifier operation

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VPOP3 v6.18 released
Posted by Paul Smith on 22 March 2016 01:57 PM

This is a recommended upgrade for users of v6.17.

We have just released VPOP3 v6.18 which you can download from

This is a free upgrade for all users who have active software maintenance or priority support on 14th March 2016. Other users can purchase the upgrade and 1 year of software maintenance on our website.

The full change log can be viewed in our issue tracker.

Main Changes in v6.18

  • Fix: SMTP Rules were broken in v6.17. You should upgrade to v6.18 to resolve this issue.

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