[sclug] sendmail dns question.

[James Fidell]

Quoting Tom Dawes-Gamble (tmdg at tmdg.co.uk):
> Hi,
> 
> 	OK you sendmail and DNS gurus what have I done wrong.
> 
> [root at jabog named]# nslookup -querytype=MX triv.org.uk 
> Server:         127.0.0.1
> Address:        127.0.0.1#53
> 
> Non-authoritative answer:
> triv.org.uk     mail exchanger = 90 mail.makyo.org.
> triv.org.uk     mail exchanger = 10 mail.triv.org.uk.
> triv.org.uk     mail exchanger = 80 jabog.tmdg.co.uk.
> 
> on jabog.tmdg.co.uk I have added triv.co.uk to the
> /etc/mail/relay-domains 
> 
> The other day someone sent a message to simon at triv.org.uk and I guess
> mail.triv.org.uk was off-line or unreachable for some reason.  So the 
> mail arrived at jabog.tmdg.co.uk and then jabog.tmdg.co.uk sent the mail
> to mail.makyo.org who in turn sent it to jabog.tmdg.co.uk  and so the
> look continued till it got "too many hops"
> 
> So what is wrong?  Surely jabog.tmdg.co.uk should not have sent the mail
> to a host whose MX is greater?  (or equal for that matter).
> 
> jabog is a name server but not for triv.org.uk. 
> 
> hostname(1) returns jabog.tmdg.co.uk 
> 
> So what is wrong?

Ugh.  All of a sudden I realise it's ages since I actually b0rked anything
in sendmail.  What is the output of the following on jabog? :

  /usr/sbin/sendmail -bt
  3,1,2 simon at triv.org.uk

Also, what's the output of

  host -t mx triv.org.uk

on the same machine?

James