You can run SecurityGateway for Exchange / SMTP on Windows operating systems. SecurityGateway for Exchange / SMTP is a software product developed by Alt-N Technologies, Ltd. and it is listed in the category. SecurityGateway for Exchange / SMTP is licensed as Shareware which means that the software product is provided as a free download to users but it may be limited in functionality or be time-limited. You may need to pay at some moment to continue using product or to use all functionalities.