Troubleshooting smtp(?)

[mark]

On Tue, Apr 14, 2009 at 8:43 PM, Curtis Sandoval
<curtis.sandoval at gmail.com>wrote:

> 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.
>
>


If nothing has changed on the box, the problem has to be elsewhere. To
eliminate the obvious, did you verify that the cron'd processes ran and
generated and sent mail? Checked the uptime to verify that the system didn't
reboot itself at the exact inopportune moment?  The point is to assume
nothing, and to go back and test any assumptions you may have made. Also,
can you telnet out to the Internet on the system on port 25 to verify that
Roadrunner hasn't started blocking that on you?  Also, call Roadrunner--the
sales number, not tech support. Tell them you want to start new service.
Tell them you are concerned about the new "conflicker" virus, and want to
know what they are doing to stop it.  If they say anything that remotely
sounds like they are blocking port 25, or screening incoming tcp packets on
that port, there you go.

--
mark
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