Our server has been suffering the same problem for about a week and a half -> two weeks. I've been "bandaiding" and thinking the problem was due to virus infected clients causing increases in SMTP.
It is unlikely that a virus would cause this. While they can generate large volumes of E-mail, it shouldn't be enough to harm the server (as is the case here).
However, this post makes me wonder if that is not the case. Reading the Imail manual I got the impression that multiple instances of smtp32.exe was normal. Is this not the case?
It is quite normal for there to many many SMTP32.exe processes.
What is not normal is either to have lots of them for a long period of time (for example, 25-30 of them for an hour, which would indicate a very large volume of E-mail or other problem), or for them to take up 100% CPU time for an extended period of time (a few minutes).
What could have caused smtp32.exe to "get zombied" if that is the problem?
Nobody knows. It's been reported, but nobody has managed to find the problem E-mail and post it here. It probably only affects certain versions of IMail.
-Scott
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