Think I'm have to abandon Thunderbird.
I know that nobody cares out there but I'd like to tell you so you understand why. Have used Thunderbird for quite a while. Recently, however, I have WAY too many mystery problems: server connections timing out or unavailable, disappearing emails, correspondents NOT getting my emails, me not getting their emails. I've had to reinstall and setup the program several times in the last few months. Each time, new problems. Really HATE to abandon independent developers/organizations in favor of commercial programs, but I need a app I can rely on. Gonna see how I do for another couple of weeks. Is there an app that can scan settings and flag problems? Program's getting fairly complicated. Remember Scotty, "The more they overthink the plumbing, the easier it is to stop up the drain."