I am having a repeated problem with Thunderbird. It often, but not always, comes up with a popup asking me to add a Security Exception for one mail address. If I confirm an exception it sometimes just repeats the popup, and sometimes loops to another email account.When it is in this state I cannot get into any email account. According to Bluehost support it may be something to do with SSL and they suggest taking this off, as well as changing some port numbers. But then sometimes I disconnect and can access the mail normally without doing anything other than run up Thbd again. They say they don't support 3rd party applications.