Umoth said

As of 2 days ago Thunderbird has lost all of this years emails. It does, however, show all of last years emails (that should either be archived or deleted.) I can delete them (last years mails) but Thunderbird will then promptly download them again, and my inbox is re-filled with messages from 2014. It is like my PC is stuck in a time-warp, and thinks it is Friday July the 13th 2014. (today is Friday June 12, 2015) I have mailed myself, and the message goes out, and can be seen if I log into my ISP's mail account. Any iodeas?

I hate BT mail, hosted by Useless Yahoo. My PC just re-downloaded all 2,500+ of the last 13 months mails. Sorry to bother.

BT: GET SHOT OF YAHOO! They suck!