Re: [Exim] Address rewriting vs. CNAME records?

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Autor: Exim Users Mailing List
Data:  
A: Vadim Vygonets
CC: exim-users
Assumpte: Re: [Exim] Address rewriting vs. CNAME records?
[ On Thursday, February 6, 2003 at 01:32:31 (+0200), Vadim Vygonets wrote: ]
> Subject: [Exim] Address rewriting vs. CNAME records?
>
> It's not Exim-related, but it's mail-related, and exim-users is
> the only mailing list I know that has people (notably Philip) who
> grok mail-related RFCs.
>
> My friend's domain (let's call it friends.dom) has a CNAME record
> pointing to a host name under my domain, which has an MX record
> to itself, and serves mail for both domains:
>
> foo.friends.dom.    IN    CNAME    bar.my.dom.
> bar.my.dom.        IN    MX    10 bar.my.dom.


Why create such an obfuscation?

Why not just do the obvious and much more proper (despite the recent
relaxation mentioned elsewhere):

    foo.friends.dom.    IN    MX    10 bar.my.dom.
    bar.my.dom.        IN    MX    10 bar.my.dom.


This shows the true intent and makes it very clear that foo.friends.don
is a proper e-mail domain.

It also makes it a _lot_ easier to figure out what's going on if the
mailer at bar.my.dom suddenly complains that an MX points to itself!

--
                                Greg A. Woods


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