I'm going to stop using Mimecast filtering for a client as we are upgrading everything to Exchange 2013. I heard the anti-spam and anti-malware in Exchange 2013 is quite good. Do you guys agree with this?
Is this anti-malware like a proper anti virus scanner for emails? One of my colleagues was suggesting Karspersky, but I'm not a big fan, it is quite heavy in my opinion. I don't want the server to slowdown because of a anti virus that is not very well optimised. We know it works at least and has a good detection rate, but this is talking only about the normal anti virus software work a server/workstation, not for a email server.
Do you guys have any suggestions please?