Hello, so finally this happens to me too. I lost all my emails in Inbox before August 2025. I think it happened after one of these usual alerts 'you should compress emails'. I did this in the past 6, 7 years and nothing was lost so far. I also have plenty of space on my computer, that's not a thing. I tried a couple things I found in web but doesn't help. Couple emails that I had for example in an 'important' folder are still there. I'm really annoyed. I didn't had a glue at all that this compression alert will delete files in the inbox one day, only those in the trash box. Maybe there is a last chance to get them back but I'm afraid that they are gone forever and I will put everything from my inbox into an other folder in future or maybe even better go back to Apple Email where this never ever happened in the past 25 years.

Thank you, Chris