When attempt to 'open a message – TB instead opens a Send window, using an earlier email address of mine with a provider I no longer have an account with. (but I still want to retain record of messages in TB). I’m unsure what the pop-up yellow blocked message means – ie “unique identity matching the From address”?? Any suggestions will appreciate. Please see attach screen dump. TB Preview panel is fine. Background info (in Australia) My email account was with Westnet/iinet but now handled by The Messaging Co. I also use TB to access my google gmail account which continues to work fine with TB. (Perhaps unrelated, but on same day this problem occurred (Wed 15 Jan AEST), iinet/westnest Support reset my (mobile) account in the hope system would correctly identify my replacement iPhone as 4G suitable, now that 3G network in Australia has closed down.) Desktop Windows 10. System Restore (to day prior) tried but no change. TB version up to date. I just culled out messages not needed in case to many. I don't know max can have? Thank you