On Wed, 2011-11-23 at 16:54 -0800, Jay Welch wrote:

Dovecot Version: 1.2.16

I am having issues with Thunderbird connecting to Dovecot at random times. Usually an error comes up and states that Thunderbird cannot connect to the server. The only way I have been able to fix this is reset/repair the network connection or reboot the computer. Is there any parameters I can change in Dovecot to fix this issue? Does anyone know what is likely going on? I have been reading forums and I cannot find anything.

Dovecot always logs the reason for logout, e.g.:

Nov 24 02:53:24 imap(tss): Info: Connection closed in=0 out=291

This means that the connection got disconnected (i.e. Dovecot didn't do the disconnection)

Nov 24 02:52:47 imap(tss): Info: Disconnected: Logged out in=8 out=334

And this means that the client used a LOGOUT command.

and so on. Find the log entries about the times when you're having problems. Dovecot logs about every single connection it sees. If you don't see a log message about some connection, it means that Dovecot never saw it, and the problem is outside Dovecot.

I'd first look into any antivirus/software firewalls you've installed. They're usually the reason for connection problems with Windows.