Random messages stuck in mqueue

Scott Silva ssilva at sgvwater.com
Wed Aug 1 20:16:07 IST 2007

Corey McFadden spake the following on 8/1/2007 10:28 AM:
> It does seem as though the problem begins when MailScanner disposes of a
> message.  Maybe someone could clarify the process whereby Sendmail picks
> up the message and decides to deliver it (locally or relay or whatever.)
> It doesn't look like a DNS issue.  We've got a local resolver (that has
> a PTR record for the machine's IP) and a backup resolver.  I've done a
> number of DNS tests and haven't been able to produce an error there.
> On other systems everything happens so quickly that it's hard to see
> what happens but does it resemble this:
>  - MailScanner finds message in mqueue.in  -- but not with http
 --strike  <http://mqueue.in>
>  - MailScanner processes message and dumps qf/df into mqueue
>  - Sendmail daemon periodically scans mqueue
This is the queue delivery method
> or:
>  - MailScanner finds message in mqueue.in 
MailScanner processes message and drops qf/df into mqueue
Then calls a sendmail process to process mqueue

This is the batch method
> What are the implications of the "Delivery Method" queue vs. batch
> option on the above?
The batch method might be faster on the delivery, as the queue method queue
runner looks to be set at 15 minutes. It depends on how much mail you process.
> Thanks for the input!
> -Corey


MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!

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