[Mimedefang] Repeated messages

David F. Skoll dfs at roaringpenguin.com
Mon Jul 29 16:59:00 EDT 2002

On Mon, 29 Jul 2002, Stefano McGhee wrote:

> With your help
> though, I made the timeouts for Sendmail 5 minutes instead of equal to MD
> (~25 min).

That's quite a disparity.  I think one or two minutes difference (e.g.,
25 and 23) should be fine.

> That change got rid of Sendmail tempfailing messages because MD
> tempfailed (even with F=T NOT set).  However, now when Sendmail is overrun
> by a burst of messages, recently 60 or so at about 225k each, it exhibited
> the behavior I was telling you about.

You may want to consider splitting your mail server in two.  Have one
machine simply accept and queue incoming mail, with a persistent queue
runner sending it to the second machine running MIMEDefang.  The great
advantage is that bursts of mail are smoothed out and serialized.  The
disadvantages are extra delay in delivery (probably not a big problem)
and the fact that the MIMEDefang will always see the client_addr as the
other machine rather than the "real" sender.  I'm working on a fix for
the second problem; stay tuned. :-)



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