[CentOS] sendmail not sending after reboot UPDATE

On Mon, Jun 09, 2008 at 11:34:11AM -0400, Ray Leventhal wrote:
> This now seems like a timeout issue.  Increasing client-side timeout to 
> > 180 seconds gets mail going just fine.
> 
> Any ideas on what might be happening since a reboot to cause this change 
> in MTA behaviour would be greatly appreciated.

DNS.  It's always DNS :-)

(more accurately, host and IP address resolution).

How long is it taking your server to resolve the IP address into a
name?  To resolve names into IP addresses?  To resolve destination MX
records?

-- 

rgds
Stephen