I want to relay messages coming through a server with a dynamic IP (Exchange) through my postfix.
My postfix my smtpd_recipient_restrictions already has a "hash:/etc/postfix/allowed_relays" option on it, and I've tried adding the Dynamic DNS name that resolves to that IP address and put it in the list but it still gave me an "relay access denied" error. Is there another way to do it? Thanks.
