Hello,Per RFC 5321, section 8, an error message MUST be sent to the sender address. This uses regular MX resolution. Of course, the sender address is the one on the envelope, which is not necessarily related to the one specified in the From: header of the email.
Regards, -- Étienne Miret https://etienne.miret.io/ _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
