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Massive network resets and connection time outs on ASA5555

We are seeing massive network resets and connection time outs in our production ASA environment. We have attempted to send 1.7 million emails from our mail server . Most of which either timed out or received connection resets.

1,754,887 emails total

1,229,037 timed out

   672,645 received connect resets

 

The emails eventually get sent.

 

QOS limit on ASA5500 set to 40 Gb/s (5 MB/s), but the mail server only reports a little over 18 Mb/s (2.3 MB/s).

If you have any ideas or the best way to troubleshoot, I would certainly appreciate it.

Thank you!

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