postfix problem with talktalk?

[Tim]

On Sat, 2007-05-26 at 17:46 +0100, Paul Ward wrote:
> 
> When sending mails I get the following error and the mail is not sent:
> 
> May 26 17:31:46 server postfix/pickup[3024]: 4D3B7B79CC: uid=0
> from=<root>
> May 26 17:31:46 server postfix/cleanup[3029]: 4D3B7B79CC: message-id=<
> 20070526163146.4D3B7B79CC at server.localdomain>
> May 26 17:31:46 server postfix/qmgr[3025]: 4D3B7B79CC:
> from=<root at server.localdomain>, size=495, nrcpt=1 (queue active)
> May 26 17:31:56 server postfix/smtp[3031]: 4D3B7B79CC:
> to=<pnward at googlemail.com>, relay=none, delay=10, delays= 0.38/0/10/0,
> dsn=4.4.3, status=deferred (Host or domain name not found. Name
> service error for name=googlemail.com type=MX: Host not found, try
> again)

That sounds, simply, like it cannot resolve googlemail.com (going by the
last bit of information).  Try looking it up, on that PC, manually.

e.g.

[tim at serge ~]$ nslookup googlemail.com
Server:         192.168.1.2
Address:        192.168.1.2#53

Non-authoritative answer:
Name:   googlemail.com
Address: 66.249.91.83
Name:   googlemail.com
Address: 72.14.205.83
Name:   googlemail.com
Address: 72.14.253.83

Additionally, I'd be very surprised if googlemail would accept a message
alleging to have come from <root at server.localdomain>.  Most mail servers
will only accept mail coming from valid domain names.  Perhaps that's
the "Host not found" issue with that failure message.

-- 
(This box runs FC6, my others run FC4 & FC5, in case that's
 important to the thread.)

Don't send private replies to my address, the mailbox is ignored.
I read messages from the public lists.