Forefront IT Services Ltd

Spam email is increasing daily and more and more servers are targeted.

Open Exchange System Manager

Expand the server you which to protect

Expand protocols

Expand SMTP

Right Click on Default SMTP Virtual Server and select Properties

On the Access tab select Connection and limit the connections here.  Don't forget to add 127.0.0.1, and the actual ip address of the server.

There is now and important, yes easy to miss option to select to enable connection filtering

Go back to the General tab of the Default SMTP Virtual Server properties page

Next to the IP Address select Advanced

Click Edit

And check Apply Connection Filter

As Gordon Ramsey would say, Done.