Ricardo Kleemann wrote:
> I'm seeing this error in the mail log, repeated many times:
> 
> Nov  8 12:44:05 email1 submit: Resource temporarily unavailable
> Nov  8 12:44:05 email1 courieresmtpd:
> error,relay=::ffff:200.189.1.66,from=<>: 432 Mail filters temporarily
> unavailable.

What mail filters are you running?  What is the load average reported by 
"uptime"?

> I already have MAXDAEMONS at 150 in esmtpd. What else should I adjust so
> I don't get the resource unavailable error?

Increasing that setting will only make the problem worse.  One of your 
filters is taking too long to accept new connections.  Unfortunately 
it's difficult to see which one is the problem.  The next release of 
Courier will feature better logging this specific problem.  You can 
apply this patch immediately if you'd like:
http://courier.cvs.sourceforge.net/viewvc/courier/courier/courier/courier/cdfilters.C?r1=1.16&r2=1.17&view=patch


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