True, that should not have been a concern. I'll go ahead and move my web archive to a hostname matching the MX and that will solve my problem. Thanks to all who replied!

-Michael


On Sep 14, 2011, at 8:07 PM, Valdis Kletnieks wrote:

> On Wed, 14 Sep 2011 20:45:43 -0000, "Sparks, Michael" said:
>> We don't have an A or CNAME for lists.law.lsu.edu because the MX for that
>> name points to another box that receives mail for several domains and forwards
>> it on to the box running LISTSERV. I've always thought that would cause
>> problems to have an A for that name when mail should be delivered elsewhere.
>> Maybe that would not be a problem?
> 
> If it's a problem, you have *bigger* problems - systems that can't follow the SMTP
> spec as it's been since at least RFC974 (Jan 1986).
> 
> If there's an MX for an address, that is to be used in preference to an A
> record for the same name.  We do it *all* the time for boxes that don't
> do their own mail service:
> 
> ;; ANSWER SECTION:
> ginger.cc.vt.edu.       14400   IN      A       198.82.161.240
> ginger.cc.vt.edu.       14400   IN      MX      0 mail.vt.edu.
> 
> See RFC5321, section 5.1:
> 
>   If one or more MX RRs are found for a given name, SMTP systems MUST
>   NOT utilize any address RRs associated with that name unless they are
>   located using the MX RRs; the "implicit MX" rule above applies only
>   if there are no MX records present.  If MX records are present, but
>   none of them are usable, this situation MUST be reported as an error.
> 
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