Hey looks lise I'm alone today ! I have continued my experiments with JPF to try to figure out what is wrong on my config. I found that Kaspersky Antivirus (the kavsvc.exe module) is intercepting mail traffic on port 110, but JPF doesn't see that thunderbird is getteing the datas next. I don't know how the communication is done. Does anyone have an idea in order JPF could deal with it and make Thunderbird work ? I remind you that I can get my mails with Thunderbird on a random basis even with the same set of rules in JPF.