I want to congratulate EMClient once again on product quality.
I did a controlled shutdown of Windows without first closing EM Client and when I rebooted and restarted EMClient it checked for database corruption and the other scan and then when it opened I had a couple hundred emails in a number of folders that were duplicates AND unread.
After a bit of research I found the DeDuplicator, ran it, and all problems were solved!
The reason I praise the product quality is that - not only does Thunderbird NOT have this feature but when you write to them about it you are told that you have use the product incorrectly and that it’s your fault.
That said I would like some insight. In the Linux/RFC world, an Email Box is a long list of messages all in a big pile with each message starting with a line “From:” and from this every different app makes it’s own index. So my question (idle curiosity) is how the index got corrupted in what is obviously a ‘known’ manner?