I have 3 different email addresses, 2 for myself and one for my wife. These all us the same mail server with the same settings. I got her a new Win11 laptop and now she is only getting a small percentage of the emails she used to. My 2 addresses still seem to work fine. I used the method of copying the whole Thunderbird folder over when I installed Thunderbird on the new computer. I looked at her email and it looks like she has stored a lot of emails with some sort of graphics in them. This is the only thing different from the other 2 as far as I can tell. She has only two filters with minimal items, one is for sex-related garbage and the other contains only 2 items which don't look like they would redirect much. I checked the folders they redirect to and there is hardly anything there. I have temporarily redirected them to two folders I created so as to check to see if there might be something going on there.

Are there any suggestions for trying to fix this?