Forcing the from address when postfix relays over smtp


Force to send all e-mail with the same email address.

accepted
This is how to really do it in postfix.
This config changes sender addresses from both local originated, and relayed SMTP mail traffic:
/etc/postfix/main.cf:
sender_canonical_classes = envelope_sender, header_sender
sender_canonical_maps =  regexp:/etc/postfix/sender_canonical_maps
smtp_header_checks = regexp:/etc/postfix/header_check
Rewrite envelope address from email originating from the server itself
/etc/postfix/sender_canonical_maps:
/.+/    newsender@address.com
Rewrite from address in SMTP relayed e-mail
/etc/postfix/header_check:
/From:.*/ REPLACE From: newsender@address.com

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