CNAMES to different domain

[Barry Margolin]

In article <4.3.1.0.20000512134900.00ba6340 at igate.sema.de>,
Tilman Schmidt  <Tilman.Schmidt at sema.de> wrote:
>At 18:27 02.05.00 +0200, Steven Mooij wrote:
>>A different reason than Thomas to make a CNAME pointing from mydomain to
>>anotherdomain is that mail-to addresses will be changed based upon a CNAME RR.
>
>That's what MX RRs are for. CNAME RRs are not appropriate for that.

No, MX records don't cause the address to be changed.  They only affect
mail routing, not how addresses are written in mail headers.  But if the
name after the @ in an address is a CNAME record, the sender is supposed to
replace it with the canonical name and then process it as if it had been
written that way in the first place.

-- 
Barry Margolin, barmar at genuity.net
Genuity, Burlington, MA
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