Reputation Filter blocks GMail?
We're starting to roll out ATP's to larger SMBs with 400+ Mbps Internet. Have really enjoyed setting them up and watching how they perform.
That said - the IP Reputation Phishing filter is pretty rough. We turned it on and saw tons of logs (Blocked Phishing) from desktops. Turns out the blocked IPs were Google IPs related to GMail and clients couldn't login properly (or render the full GMail interface). Yes - the IPs in question were listed on Maltiverse for Phishing, but seems like GMail's IP blocks would be pretty much whitelisted. So we turned off the Phishing & Anonymous Proxies check for now and we'll see how things progress.
Like SSL Inspection - we'll build up an exclusion list and see if we can tune them to allow these useful features to be enabled fully...