I have a mail server up and running using Postfix. <P>I know that open realys are very bad news, however I have NO idea where my users will be logging into this from. They will not all be in a close ...

Do you mean Anonymous access on the Authentication tab of the Access properties on the SMTP virtual server? If so, you NEED that enabled so anyone can send mail TO you, that is NOT making the system ...

If your server is falling victim to authentication spoofs, closing the open relay might not stop the spam. Patch your Exchange server with the latest fixes and service pack, then open up the Internet ...

When Chris Brown was working at Tivoli Software several years ago, the company took advantage of a black-hole list called the Open Relay Blocking System (ORBS) to fight spam. The list was eventually ...