Hi,

We have observed that Dovecot appears to make a DNS lookup of its own hostname 
many times a second. Each Dovecot server in our cluster appears to be doing 
around 50 queries per second to find out its own hostname. Rsyslog was the 
first thing we assumed was the cause, however stopping it did not help. Also 
the fact that at the time Dovecot was doing around 50 logins a second, seemed 
to correlate with it making these queries. Is there any reason why Dovecot 
would need to do a lookup of its own hosts IP address every time? Seems like a 
strange thing to do and not cache its own hostname.

Dominic

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