Smtp problem

Hi,

We’re having a smtp problem when we sent a message to a wrong user. We don’t get a confirmation of the server. This e-mail gets stuck on our domino server with the message 550 rule imposed mailbox acces.

We think it has something to do with esmtp instead of smtp. Can I swicht of esmtp for sending these automated message and use smtp, because sending normal smtp mail works fine

We’ve a mailgateway before our notesmail server.

Thank

Rgds

Rudy