PostFix IP Authentication

Routing all outgoing mails via the outgoing smarthost (IP Authentication):

  1. Ensure the IP address is added as an Authorized Smarthost (without authentication)
  2. Ensure the Outgoing User has Enable Outgoing Connection Limits: ON
  3. Be sure that the correct limits are set matching your traffic volumes per Month, Week, Day, Hour and Minute
  4. Update your configuration
    1. Edit /etc/postfix/ and ensure it contains the following line:
    2. relayhost = SMARTHOST:587

  5. Restart PostFix

For information on smarthosts, see Outbound Filtering Hostnames

Disclaimer: This documentation may contain references to third party software or websites. N-able has no control over third party software or content and is not responsible for the availability, security, or operation, of any third-party software. If you decide to utilize a release involving third-party software, you do so entirely at your own risk and subject to the applicable third party’s terms and conditions of the use of such software. No information obtained by you from N-able or this documentation shall create any warranty for such software.