Domino: SMTP error "553 Authentication is required to send mail"
Posted on 2006-07-11
Scenario: There is one Domino mail server with SMTP listener running for transferring SMTP mail to the Domino SMTP gateway. But, this Domino SMTP gateway is setup with authentication feature by other parties.
Problem: Unable to deliver mail through Lotus Notes client and having "553 Authentication is required to send mail" shown on the Domino console.
Do anyone know how to enable client authentication on Lotus Notes? The SMTP gateway is configured to have username/password for authentication process.