Offence CNAME as MX??

[Len Conrad]

>It would seem convenient if all the mail for a domain was to go
>to a single mail server, or group of mail servers, to wildcard MX
>that domain

in practice, tons of virtual mail hosts are hosted on one physical machine 
and ip, so all the domains can have identical MX records

anydomain.com.  MX 10 mx1.bigvirtualmailhost.com.
anydomain.com.  MX 20 mx2.notherbigvirtualmailhost.com.

Using $include in the zone files, you can save tons of work and errors and 
maintenance hours.

Len

http://MenAndMice.com/DNS-training
http://BIND8NT.MEIway.com : ISC BIND 8.2.4 for NT4 & W2K
http://IMGate.MEIway.com  : Build free, hi-perf, anti-abuse mail gateways