Computerized Horizons [sce-spf_discuss(_at_)declude(_dot_)com] wrote:
CNAMEs and MX records are a very bad combination. There are at least 3
ways that they can be combined, 2 of which are invalid, one is valid but
may cause problems. So the best thing to do is not use the CNAME. I
don't bother trying to remember which type is allowed -- your best bet,
if you really want to keep the CNAME, is to go through the RFCs to
figure out if the way you want to set it up is allowed.
gray:~> dig +noall +answer mehnle.net TXT|grep CNAME
mehnle.net. 43200 IN TXT "MX->CNAME is by intention. Go read
<http://www.mengwong.com/misc/rfc1912-is-wrong.html>."
;-)
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