With a DNS CNAME you cant have *any* other type  of information
associated.  Period, despite some broken (MSgrumble) implementations that
allow things like an MX and a CNAME to exist, it just doesn't work. :)
Use an A line pointing to the other host in addition to the MX.  That
should solve you hairball.

On Wed, 21 Jun 2000, John R. Andrews wrote:

> We currently have listserv running on a AIX host, call it machine1.uic.edu.
> We have an DNS "MX" record for "listserv.uic.edu" pointing to this machine,
> but no "A" record. The "A" record is for machine1.uic.edu.
>
> Right now email to [log in to unmask] goes fine and the reply
> address is [log in to unmask] as you'd want. However, (or so I'm
> told) if we add a "C" record for listserv.uic.edu, the replies now say
> [log in to unmask] Apparently, listserv follows the DNS chain to
> the real machine name. Does this make sense? We want to add the "C" name so
> the web server URL can use http://listserv.uic.edu. How can we make
> listserv always use listserv.uic.edu in it's replies?
>
> John Andrews
> [log in to unmask]
>