[LUG] Sendmail oddities

[Alex Stanley <alex@xxxxxxxxxxxxxxx>]

I'm having problems sending mail through a relay.

- The relay's set up to accept mail from the IP of the Linux box

- I can telnet to port 25 of the mail relay from the Linux box.  

- I can resolve the name of the relay on the Linux box using nslookup.

But, when the Linux box tries to send mail I get (addresses changed to protect 
the guilty ;)) :

Feb  3 10:55:10 rottcodd sendmail[8471]: i13AtAl08468: to=user@xxxxxxxxxxxxxxx, 
ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=60055, 
relay='mailrelay.domain.com', dsn=5.1.2, stat=Host unknown (Name 
server: 'mailrelay.domain.com': host not found)
Feb  3 10:55:10 rottcodd sendmail[8471]: i13AtAl08468: i13AtAk08471: DSN: Host 
unknown (Name server: 'mailrelay.domain.com': host not found)
Feb  3 10:55:10 rottcodd sendmail[8471]: i13AtAk08471: to=root, delay=00:00:00, 
xdelay=00:00:00, mailer=local, pri=30155, dsn=2.0.0, stat=Sent

Can anyone help?

Cheers

Alex.

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