Hi, I need to put an string in the from field to all the messages that come from Internet. That is possible using address rewriting ? Anybody knows ? in example, my objetive is to do same like this: Normal email from internet: mail from: address@domain.com I want to identify those messages with something like: mail from: INTERNET:address@domain.com I Have this running with event sink and Windows 2000 smtp service. Thanks in advance

You can use Transport rule like this: When mail is from Internet,then in mail subject field add some string...

You can add text with a transport rule, but you appear to need a full address rewrite. You can do this if you have an edge server as follows: http://technet.microsoft.com/en-us/library/bb123966.aspx

Thanks for your reply, but we need to add the string in the from field, not in the Subject.