Tom Sommer:
> Hi
>
> I'm running into problems with OpenDKIM and a 1024 libmilter connection
> limit (or port-reservation limit) during peak hours.
According to some source code, libmilter uses 'poll' or 'select'.
To change the select() limit you'd have to recompile the library
with a larger FD_SETSIZE value (on LINUX you also need to recompile
glibc).
> Is there any way to limit/throttle the number of connections made to a
> milter?
Reduce the number of smtpd processes in master.cf:
postconf -F smtp/inet/process_limit=900
or in main.cf:
postconf -e default_process_limit=900
Or recompile the libmilter library (and glibc if LINUX).
Wietse
