551 User not local; please try <forward-path>

Meaning

The user is not local to the server.

Common causes

• Relay denied.
• User moved.

How to fix

1. Update address.

Example bounce

551 User not local; please try <forward-path>

Related codes

• 550 5.1.1 User unknown / invalid address
• 550 5.1.2 Bad destination system address
• 550 5.1.10 Recipient not found