I installed the latest version straight from Kerio’s pages. Version is 4.0.7 and yes, I’ve read Doggeral’s suggestion to get 2.1.5 but I thought it would be rather difficult to find so old version. Also would like to hear why that version is better than newer ones? As far as I can understand usually the newer versions are better, because by the time will be notified bugs that are repaired in newer versions. That can be seen very practically in Windows -if you purchase new windows product you’ll have to prepare that by the time you have to download a bunch of updates where bugs are fixed.