@lbutlr: > Useful, but not helpful in this case because there is no way to have = > postfix check two headers
Who says that one has to implement this with headers? Do it with envelopes instead: http://www.postfix.org/RESTRICTION_CLASS_README.html Admittedly, this is somewhat difficult to set up, but it handles combinations of arbitrary check_mumble_access restrictions. UNTESTED example: /etc/postfix/main.cf: smtpd_restriction_classes = from_amazon_only from_amazon_only = # Alternative: check_client_access, but that depends on DNS. check_sender_access inline:{ { amazon.com = ok } } check_sender_access static:{ 550 5.7.1 You are not amazon.com } smtpd_recipient_restrictions = ... check_recipient_access inline:{ { user+amazon@ = from_amazon_only } } ... Wietse
