I have never enabled "Auto retrieve body" option and my .book file has about 640MB for about 10400 email headers. This means, that one header is about 60kB, which is nonsense. If I look into message list window, I can see only "from, subject, size, date". For this I would expect one header about 100 or 200 bytes. So I think, that .book file should be about 1 to 2 MB. But currently it is about 300 to 600 times larger. Why?
I can't copy list of emails from message list window and calculate sum o received email sizes. I believe it would give me size of .book file.
.book file is already so large, that any change in YAMN setting is impossible, because miranda crashes immediatelly after clicking of any checkbox.
I don't delete emails from server because I can keep them there as a backup and my email box provider counts with this approach. This is the reason for such large amount of emails.