UPDATE:
I figured out how to use ps -waux to get the CPU data, and identified the culprit -- qmail.
Apparently, qmail isn't configured correctly, and mail isn't sending, and qmail is grinding away to send mail against incorrent settings. I checked the SMTP proxy, and it has 300+ messages it has queued waiting to send.
Where is the confugration info on qmail so I can resolve the problem? Is there a way to empty the queue?
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