[CentOS] sendmail not sending after reboot

[Ray Leventhal]

Ray Leventhal wrote:
> HI folks,
>
> I've an up-to-date CentOS 5.x box on a small intranet (<20 users).
>
> We did a reboot over the weekend and all appears well except that 
> clients on the LAN can no longer send email.  Just hangs/times out.  
> No clear identifiers in the /var/log/maillog or /var/log/messages.
inserted update:
It does appear there's something in /var/log/maillog.  I found this 
entry, repeated a few times for users (now that they're here and using 
the system).

Jun  9 09:10:49 gungho sendmail[13074]: m59D9b47013074: lost input 
channel from [172.16.0.155] to smtp after mail

> We're not setup for ESMTP as it's a closed network and I'm really 
> hoping for a kickstart as to where to look to get this going.
>
> In case it helps, my sendmail.cf file is below.
>
> Thanks in advance.
> -R
> <snip>