[FC5] "Sender address rejected" for just about all email now

[Wolfgang S. Rupprecht]

"Stuart Murray-Smith" <eight32 at gmail.com> writes:
> Sender address rejected: Domain not found

This is postfix not being able to resolve the claimed domainnames that
folks are using in their mail.  What happens when you check the domain
name of a failed sender address with host.

eg  for joe at example.com try "host exampleXXX.com".

bash-3.1$ host exampleXXX.com
Host exampleXXX.com not found: 3(NXDOMAIN)

If your dns can't find even well-known domains (say redhat.com ;-))
then you'll want to fix that first.  Postfix should then fix itself
perhaps after a restart/reboot.

I just run bind (aka named) locally.  Using some isp's server usually
creates problems like the above.

-wolfgang
-- 
Wolfgang S. Rupprecht                http://www.wsrcc.com/wolfgang/