[Mailman-Users] Slow Performance on semi-large lists

[D.J. Atkinson]

>> If it's possible to do it with sendmail, desynchronizing DNS
>> lookups would be one way.  [Back to Neil's question: Any body have
>> any idea if/how to do this?] Another thought, that could help in
>> my particular situation, is for qrunner to keep a record of what
>> names have failed DNS lookup and only check those once during a
>> given qrunner batch job.  This may not be feasible, depending on
>> the software architecture.
>
>What to do about the posts sitting in your sendmail queue when you
>do that?  Setup a second box to smarthost for your current sendmail
>system.  Reconfigure sendmail on your first system to send all
>outbound mail through that new box.  Let it run for a bit, and all
>the outbound mail under sendmail should drain to the new smarthost.
>Now install a new MTA on your list server, and let the smarthost run
>until all its mail drains out.  You can then recommission the
>smarthost.

Actually, the sendmail queue is fine.  It's getting things from the
mailman queue into the sendmail queue where the delays are happening.
That's using the SMTPDirect mailman delivery method.

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