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does anyone knows of any good software for Mac OS X or at least for RHEL/CENTOS Linux that I can run against my SMTP Server?

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2 Answers

up vote 3 down vote accepted

I've used Russell Coker's* postal in the past.

*Of bonnie++ fame.

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I'd second that. –  LapTop006 Sep 5 '09 at 5:55
i like it a lot, thanks! –  alexus Sep 8 '09 at 21:14
On OS X latest versions of postal give a Bus Error. –  jasonjwwilliams Dec 16 '09 at 0:46
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You can also try Xstress http://xstress.sourceforge.net/ although you will have to compile it from the source code.

From their Readme:

xstress is an SMTP Stress Testing Tool. Essentially xstress creates multiple connections to (your) mail server and sends multiple mails repeatedly over all connections.

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