Re: CNAME records (was: Re: dynamic DNS within a non-dynamic domain)

[miquels@cistron.nl (Miquel van Smoorenburg)]

Note that AFAIK all SMTP mailers (well, sendmail at least) will rewrite the 
addresses in the mail headers. That includes rewriting a CNAME pointer to
the canonical name it points to.

So even if you send out mail with the CNAME in the From: header field,
the recipient mailer will rewrite it.. no way around it.

The correct way to solve this is to not use CNAMEs but to just set
up an extra A + MX record. Or perhaps just an MX record if all you're
using it for is mail.

Mike.
-- 
 Miquel van Smoorenburg |  
    miquels@cistron.nl  |  Luck is when preparation meets opportunity


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