Troubleshooting questions

[Drew Marshall]

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jester wrote:

> I too am having the same problem. In trying to trace this problem we have
> tried turning off SA, Razor and DSPAM, and only using RBL checks and the
> mqueue.in is still continually climbing. After I restart MailScanner it
> seems to run fine and clear queue in a few minutes, but, after running
> for
> over an hour, the queue.in will climb back to over 1k (almost like
> something is dying, but no idea as to what is). I have checked razor in
> dbug and shows to be ok, same with SA. I have run MailScanner in debug
> and
> all seems fine. I have no idea what could be causing this.
>
> Using MailScanner 4.3.3
> SA 3.0.2
> DSPAM 3.2.4
> RedHat 1gig memory
>
> Any help would be much appreciated!

Are you running a caching name server? If not do so as it could well be
DNS issues. Some ISPs get excited about too many DNS requests and start
to tar pit for example. The other slow down I have also seen is a slow
down due to IPv6 resolution so it's also worth a check if you are not
running IPv6 on your network.

Drew

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