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Postfix: Rewrite sender on outgoing mails

With Postfix you can rewrite the sender, respectively the from-headers for outgoing mails. Prerequesite is an existing Postfix installation. Create the /etc/postfix/sender_canonical, with the following example content (you may use spaces or tabs to separate the columns): root     info@example.net www-data         www@example.net test@example.net test2@example.net Next create the sender_canonical.db file: postmap hash:/etc/postfix/sender_canonical […]