[ietf-dkim] Issue 1365: drop "never send mail"?
graham at gmurray.org.uk
Tue Feb 27 23:51:17 PST 2007
Jon Callas <jon at callas.org> writes:
> You can say that you never send mail from a domain with SPF.
SPF operates on the RFC2181 envelope, so with SPF you can state that a
domain will never legitimately appear in the SMTP MAIL FROM: (or
EHLO). It offers no mechanism to say that the domain will not be used
in any RFC2822 From:, Sender:, Resent-From: etc
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