User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0 SeaMonkey/2.39 Build ID: 20151103191810 Steps to reproduce: Computer needs to be running for more than a couple days at a time. Nothing seems to trigger it specifically that I've seen, and the time can vary before it starts to have issues. Actual results: The computer I use for work has several email accounts associated with it that I need to monitor. I never shut my computer down unless I have an update that requires it to be rebooted since I have mail forwarding when I'm out of the office. So after having the computer running for more than a couple days straight (no set time, seen it in as little as 3 days and as long as a week), the program stops automatically checking for new emails. I have tried resetting the time limit for when to check for new email, and tried closing the program and restarting it, but that doesn't fix the problem. I actually need to reboot the computer for it to start working again. If I manually check for new email though, that works fine. It still won't automatically update though unless I reboot my computer. I have no way of knowing that the program has stopped checking for new email, so if I suspect it, I have to manually check for new email and then I know it's having issues when it downloads a bunch of new emails. It's just an annoyance that I would like to have fixed as I may end up having a bunch of mad customers if I don't catch it in time. Expected results: It should not stop automatically checking for new emails, and it shouldn't require a reboot of the computer to fix it.