Duplicate emails downloaded
Sometime this afternoon (15 Nov 2024 GMT) T'bird starting downloading almost messages going back to 11:33am on 6 March 2019. My inbox has either a read and unread version of each email, or two unread if I hadn't read the original. Some are not duplicated, but I haven't yet been able to discern a pattern.
This is POP.
T'bird version is now 128.4.3esr (32-bit). I just updated in the hope that there might be a fix in there. The previous version was 128.4.1esr I think. Certainly very recent.
Running on Windows 11.
Two questions: 1) how do I stop this happening? 2) is there a way I can selectively delete all the dupes?