I'm running smartermail enterprise 15.7 build 6970.  I'm having troubles with sporadic issues where the outlook desktop client can't delete emails for IMAP users.  Most of the time the deletes work fine but throughout the day you try and delete an email and nothing happens.  Starting and stopping the smartermail service on the server or exiting and restarting outlook seems to correct the problem.  However, the same issue causes outlook rules to fail saying it can't remove the message from the folder.

I thought the first thing I should do is see if there isn't a more current build I could try.  Not version...I can't upgrade because my version of windows server is older as well. I'm the only user so it's not worth me buying a new version of smartermail and upgrading the server software.

When I look at the legacy builds downloads I see build 6985 listed as available, for example, but it doesn't say for what version of smartermail nor is there documentation that I can find that describes what was fixed in the build.  Can anyone tell me where I can find that info?