SMTP problem - solved

[G. Armour Van Horn]

In addition to the issue related below, at the same time we were also 
experiencing a problem for some users updating their websites on the 
server for via ftp, and at least two iBooks were unable to connect using 
ssh. My conclusion was that the real problem was a lower-level issue 
with TCP/IP in Fedora Core 5. Tonight I pulled the hard drive, video 
card, and NIC from the problematic system (an Athlon 1GHz that had been 
running without error for years) and bolted them into another system 
(P-IV 1700) and everything is running perfectly.

I'm thinking there is some issue between the current kernel or TCP/IP 
implementation and the chipset on the Athlon board. When I return it to 
service I'll make sure I stay at Fedora Core 2 or earlier, with which it 
has no issues.

Thanks for the help.

Van

G. Armour Van Horn wrote:

> Two weeks ago one of my servers was compromised and I had to rebuild it
> from the ground up. I jumped a couple of versions, installing Fedora
> Core 5. I dragged over my previous MailScanner directory and installed
> MailScanner 4.55-10.3.
>
> I was having some odd problems with not several SMTP servers failing to
> deliver mail, so after a couple of days of head scratching and with some
> help here on the list I switched to Postfix. The text of the error
> messages changed, but essentially the same servers would initiate an
> SMTP session and then never close it.
>
> Fearing that I may have caused some problems due to my unfamiliarity
> with Postfix I switched back to Sendmail, but after many hours of
> fighting the problem I still can't receive mail from several important
> mail servers. That is, from several servers that are important to users
> on the system.
>
> I'm pretty sure this isn't actually a MailScanner issue, but I figure
> that there are quite a few experts here, so I'd appreciate it if anyone
> has any idea of what I should be looking at. Below are four lines from
> maillog, each pair of lines indicate a message that never arrived. Any
> suggestions would be welcome.
>
> Van
>
>
> Oct 15 20:50:27 vanquish sendmail[13915]: k9G2oQu2013915: timeout
> waiting for input from mail.networksolutionsemail.com during server 
> cmd read
> Oct 15 20:50:27 vanquish sendmail[13915]: k9G2oQu2013915:
> mail.networksolutionsemail.com [205.178.146.50] did not issue
> MAIL/EXPN/VRFY/ETRN during connection to MTA
>
> Oct 15 21:03:43 vanquish sendmail[14141]: k9G33hTX014141: timeout
> waiting for input from mailout.whidbey.net during server cmd read
> Oct 15 21:03:43 vanquish sendmail[14141]: k9G33hTX014141:
> mailout.whidbey.net [209.166.64.124] did not issue MAIL/EXPN/VRFY/ETRN
> during connection to MTA
>
>
>
>
>
>
>

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