I wasn't sure where to post this so I chose the General forum. I'm looking to replace an Exchange server with an open source solution. It should use a database (preferably MySQL) to store its mail. It'll need some sort of antivirus solution for the SMTP protocol as well as the ability to scan the database for viruses (hopefully in real time) and a spam filter. In addition, it will have to have a web-based mail interface (PHP?) and I'd prefer not to have to write one myself. Does such a solution exist or am I dreaming? Thanks! J.