Troubleshooting smtp(?)

[Curtis Sandoval]

All,

I've run into an odd problem.  I've been running python (2.5) scripts on a
Linux box (Suse 10.2) for probably two years through cron.  These scripts
email me using python's smtplib and the sample code from the Python
documentation, and nothing has been changed on the o/s or the python or the
Linksys wireless router that is hooked into my Roadrunner cable modem. (The
machine itself runs with no monitor, I only shell into it and manage the
scripts) On Monday I didn't get all of my expected messages, and I have
ruled out nearly everything.  Roadrunner says it's my problem, but I
suspected it was some sort of Conficker countermeasure.

My problem is that I didn't do anything explicit to set up the smtp
functionality of my o/s and have no idea how to troubleshoot it or even
check the message queue.  Messages sent using 'mail' seem to succeed, as do
messages sent using HELO.

Any suggestions as to how I can diagnose and/or rule out issues with this?
My next step would be a fresh install, of Suse 11 or Ubuntu, but I'd like to
not accept the ID-10T error and actually learn what happened.
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