[ALUG] MX/Zone/DNS question

[Brett Parker]

On Fri, Jan 26, 2007 at 09:22:40AM +0000, MJ Ray wrote:
> cl at isbd.net wrote: [...]
> > I have Postfix on my home system (for sending mail).  If I want it to
> > receive mail as well what do I need to do to the zone file[s]?
> 
> Short answer: it depends how your zone and Postfix are configured.
> 
> > At BSNet (where isbd.net has its zone file) will the CNAME entry I
> > already have mean that mail for xxx at home.isbd.net will get sent on or
> > do the MX records for isbd.net catch home.isbd.net mail as well?
> 
> More likely the first than the second, but I seem to recall that some
> buggy mailservers handled CNAME badly.

Actually not buggy behaviour - an MX should always point to an A record
(part of the spec, IIRC), and hysterically, an A record was checked for,
now the order is MX -> A -> undefined evilness!

> > If home.isbd.net mail *is* sent on to my home machine do I need to do
> > anything to the zone file there for it to accept the mail or will
> > having Postfix listening on port 25 be all that's needed?
> 
> Andrew Savory recently did something similar.  See
> http://www.andrewsavory.com/blog/archives/001257.html
> (but Googlemail really does not rock).

Opinion, not fact (I have never and never intend to use Google mail, so
I can not say wether it rocks or not - but I'd rather my mail wasn't
indexed by Google, TYVM).

Cheers,
-- 
Brett Parker