[dovecot] Failure in the presence of too many connections

[Mark E. Mallett]

Had an event today where dovecot refused new connections and would not
accept more until restarted, whereupon it worked for a few minutes and
locked up again.  Looking at the logs it appeared that it had run out
of file descriptors.  I increased the open files limit and started it
again-- which worked but it only pushes off the problem.

Does dovecot keep an open file descriptor for every imap or pop3
child?  If so, this would argue more towards a tcpserver sort of
control.  If not, perhaps something is leaking..

-mm-

PS: assume you saw recent RFCs 3501 and 3502 ?