auth: Error: auth worker: Aborted request: Lookup timed out

Hello,

I was checking the errors on my mailbox server using "doveadm log errors" and found that around 2-3 times a day I get the following error:

Jan 29 22:14:43 auth: Error: auth worker: Aborted request: Lookup timed out

Any ideas if this is a bad sign? For example some timeout on my side which is too low or is it just an aborted connection from the side of the IMAP client?

The configuration on my Dovecot mailbox server can be found here:

http://article.gmane.org/gmane.mail.imap.dovecot/80823

It is a Debian 7 box with standard debian packages.

Best regards ML