IMAP client not logging off

[GordonM]

I believe that the IMAP client is not logging off between mail checks.  This causes other clients, e.g. Thunderbird, to report that the the connection failed because the server is busy with another connection.  The server in my case is Mercury/32.

Thank you
GordonM

[Kostya Vasilyev]

Yes, the app keeps IMAP connections on for a while, because IMAP allows multiple connections to have simultaneous access to an account / folder.

POP3 connections are gracefully terminated right after checking mail in the background, because POP3 does not allow concurrent access.