PostFix iP Authentication
Routing all outgoing mails via the outgoing smarthost (IP Authentication):
- Ensure the IP address is added as an authorized smarthost (without authentication).
- Ensure the outgoing user has correct limits set matching your traffic volumes.
- Update your configuration
- Edit /etc/postfix/main.cf and ensure it contains the following line:
relayhost = SMARTHOST:587
- Restart PostFix.