Re: An A record is an MX record and is a missing MX....

[Randy Bush <randy () psg com>]

> MX records are only required if you want to have more than one mail
> exchange servers to serve your domain, e.g. if you want to have a
> secondary mail server as a relay if the primary server goes down.

actually, i suspect the more common use is that one has a collector
server for a lot of local infrastructure, as in

   @      A     666.42.7.11
   foo    A     666.42.7.12
          MX  0 @
   bar    A     666.42.7.13
          MX  0 @

randy