Spam Relaying on a Domino SMTP Gateway
Posted on 2004-08-04
We currently have a problem with people using our Domino SMTP server to relay spam.
On our gateway we have our SMTP Inbound Relay Control fields and SMTP Outbound Control fields set as blank. However, when we place * in the "Deny messages from external internet domains" and "Deny messages from external internet hosts" fields we stop being used as a relay but cannot send email via the gateway from our Domino Email server with a 554 error message being returned to our users.
We have checked that our Domino SMTP server and Domino Email server is only using TCP/IP notes protocol to connect to each other as the smtp protocol is not running on our email server.
Our global domain name is set as Pierhouse, our notes domain is Pierhouse and our local primary internet domain name is pierhouse.co.uk. We have also 6 alternate internet domain aliases.
Both of our servers are running Domino 5.0.7.
This spam relaying as become a real issue to us and 500 points is available to whoever can help us solve it.