Can't stop relaying

Hi, I have 2 servers. One is Win2k running 6.5 and the other is Redhat Linux with 6.5.1. Both are SMTP servers and both have the same configuration document specify no relay.

Router/SMTP / Restrictions and controls / SMTP Inbound Controls / Deny messages to be sent to the following external internet domains: (* means all).

I have a * in this field. On Win2k if I send a mail to the server it is denied for policy reasons (great). On Linux it is accepted. Came in today to find 79,000 messages queued for transmission!

Am I missing something here? I am new to linux so perhaps I need to specify this in a different way?

Help appreciated.