Brett Watson wrote:
Acting on Chris' request, Aardvarks.example.com
finds itself unable to send mail to Bob, because Bob's mail policies reject
mail from unknown parties.
Bob email domain can publish the policy. If the domain express that "we
are using transport enforcing filters based on the MAIL FROM" than
Aardvark will put itself into the MAIL FROM as sender otherwise it put
Bob into the MAIL FROM as return path.
Additionaly Aardvark SMTP client can start with Bob address in the MAIL
FROM and if there is a 5xx rejection it can start a new mail with itself
int the MAIL FROM.
z2
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