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.
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Miquel van Smoorenburg |
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