Possible to change "from" email to something other than [email protected]?

When using the built in smtp server, is it possible to change the from email address so it doesn’t show [email protected] but rather [email protected]?

This question has been asked many times but no real answer exists.

  1. Modify your /etc/postfix/generic
  2. Add the following to the end of /etc/postfix/main.cf
    smtp_generic_maps = hash:/etc/postfix/generic

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