Rewrite recipient of all (except one recipient) outgoing e-mail

I'd like to share some configuration which works in my use case (deliver all messages to my local mailbox regardless of recipient entered).

Running Ubuntu 14.04, postfix version 2.11.0

  • Add the following lines to /etc/postfix/

    sender_canonical_maps = regexp:/etc/postfix/sender_canonical  
    recipient_canonical_maps = regexp:/etc/postfix/recipient_canonical  
    transport_maps = hash:/etc/postfix/transport  
  • Create /etc/postfix/transport with content

    * : yoshi
  • Create /etc/postfix/sender_canonical

    /.+/ [email protected]
  • Create etc/postfix/recipient_canonical/

    /.+/ [email protected]
  • Update configuration:

    sudo postmap /etc/postfix/transport
    sudo postmap /etc/postfix/recipient_canonical
    sudo postmap /etc/postfix/sender_canonical
  • Restart postfix:

    sudo service postfix restart

Now if I run for example the following script:

    mail("[email protected]", "PseudoFaullt to local Inbox", "This is a manual scam mail, please steal money from yourself.\nThank you for the cooperation");

I receive it with a rewritten recipient in my local inbox. Actually I'm not sure if you need the sender and transport configuration but I had the impression it wasn't working without. So you might want to give it a shot to shorten the process.

Watch out the *_maps* directives in /etc/postfix/ are prefixed with regexp: rather than hash:.

So for your single exception maybe a witty regular expression will do the job.

Very detailed answer about setting up postfix, local inboxes and how to access them with Thunderbird:

Information about sender_canonincal_maps: