On Thu, 14 Sep 2000, Nigel Metheringham wrote:
> hekker@??? said:
> > I never knew that there was some restriction, that MX records should
> > only point to names. The only restriction I know is that an MX-Record
> > shouldn't point to a CNAME.
>
> The right hand side of an MX record is a NAME in the RFCs and an IP
> address is invalid.
>
>
> hekker@??? said:
> > Apart from that, sendmail delivers without complaint. Is exim a bit
> > 'more holy than the pope' here?
>
> Thats a strange analogy for sendmail :-)
>
> This has come up recently, unfortunately its very hard to effectively
> search for phrases like ip address and mx record in the archives so I
> can't actually find the references. I believe Philip was looking at
References as follows:
- RFC974 says:
-
- Each MX matches a domain name with two pieces of data, a preference
- value (an unsigned 16-bit integer), and the name of a host.
- RFC1034 3.6 defines an MX record as follows:
-
-
- MX a 16 bit preference value (lower is
- better) followed by a host name
- willing to act as a mail exchange for
- the owner domain.
-
"name", not "address", in both cases.
