RH9 SMTP/POP3 problems

[Dan Trainor - hostinthebox.net]

I think that this is the wrong list for troubleshooting this kind of 
problem...

However, I know how much of a pain in the ass that this can be.  ANy 
chance that DNS is flakey?  Are you running round-robin DNS?  This can 
happen by "accident" sometime, if two entrys are made for the same 
hostname.  Although if it was a DNS problem, I would suspect that LOTS 
of people would have this problem (About 50% of people would have a 
problem at any given time, if there's a 1:2 round-robin setup, and so 
on).  How about telling us how often this happens?  Does it happen with 
specific machines more than others?  Anything else?

Thanks
-dant

Eucke Warren wrote:

> I am hoping someone will recognize some of the symptoms that I am
> experiencing and be able to suggest a direction for a cure.  I have a couple
> of servers who's primary role is email.  These are all RH9 updated via
> FL/apt-get with all current and available patches applied.  I am also
> running Spamassassin/spamass milter/vexira.  99% of my users are using
> Outlook Express for their clients.  Frequently, when the users try to send
> email, they get a message that the Server Unexpectedly Terminated the
> connection and the message does not get sent.  After some time passes....the
> message will eventually be sent.  I have poured over the logs and cannot
> seem to find anything that would suggest a pattern.  I have checked TOP and
> FREE to see if maybe the server is overloaded and that has not been the
> case.  I have checked the firewall and tightened up a thing here and there
> but nothing that would seem to be related....though I did see one of those
> /220/220/220/220 gethostbyname entries.  I am not running anything that
> should be vulnerable to that exploit though.  Any suggestions?  Anything
> else I can check?  I am beginning to suspect that the problem may be in a
> module that was updated recently but am not sure.
> 
> Thanks guys!
> 
>