CentOS 8.x postfix replace addresses on outgoing email

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The below steps can be used to replace addresses (any address from, to, cc, etc.) on outgoing email. To replace addresses anywhere in email use:

  1. Add below line in '/etc/postfix/main.cf'
    smtp_generic_maps = hash:/etc/postfix/generic
  2. Create the generic file '/etc/postfix/generic' with below content:
    @localdomain.local user@example.com
  3. Create hash postmap of generic using:
    cd /etc/postfix
    chmod 600 generic
    postmap hash:/etc/postfix/generic
  4. Restart the postfix services
    systemctl restart postfix


See related CentOS 8.x postfix rewrite sender address on outgoing email


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