I have a number of email accounts based on HostMonster servers. Until this morning Thunderbird recognized those accounts. I had set up my Thunderbird account with a security exception for each account and for the last couple of years all was well. This morning it will not recognize these accounts, nor will it allow me to shut down or move to my gmail.com accounts. In other words I am stuck with no email. I will of course be shutting down using the Task Manager so I can do things in a manual sense, but if this is a permanent problem, will have to look for a new solution. I have used Thunderbird for many years, this is the first problem of this magnitude.