Have root send as a different address using postfix

If you have scripts or other services that run as root that need to send to outside email addresses, via postfix, without being root@hostname, this is what you need to do:

    1.  sudo vi /etc/postfix/generic

      root name@tld.com

    2. sudo vi /etc/postfix/main.cf

      smtp_generic_maps = hash:/etc/postfix/generic

    3. sudo postmap /etc/postfix/generic
    4. sudo systemctl restart postfix

Done! Now root will send as name@tld.com instead. Substitute whatever you want for name@tld.com

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