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Old 22nd August 2006, 18:50
pablito pablito is offline
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Does the log show what IP is in the rhost/lhost? If it isn't the localhost then perhaps you have a client trying to authenticate but failing just as the error shows? If it is the localhost then something indeed is wrong with the dovecot config.

I only see those errors when someone fails a login. I rarely see a persistent crack attempt but that too is always possible.

You might also do a cold restart of dovecot to make it isn't a hung session.
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