[sclug] sendmail dns question.

[James Fidell]

Quoting lug at assursys.co.uk (lug at assursys.co.uk):
> On Sat, 19 Jul 2003, Simon Heywood wrote:
> 
> > While I'm on the subject, does anyone know if it's regarded as okay to
> > have CNAMES as the target of MX records?
> 
> DNS & BIND ("Miscellaneous" chapter) says that you cannot use aliases for
> the right hand side of any any record, except CNAME records.

I'm almost, but not quite, interested enough to see if BIND enforces
this.  I know some nameservers don't, which is possibly why some people
have used CNAMEs as MX records in the past.  (A bit like some people
who have used underscores in FQDNs because their nameserver allowed them
to, even though it was contrary to the RFCs.  Not that I'd mention the
name of a large mobile network operator, not me.)

James