Mail app on monterey

Hello good people,

i am having a very strange problem with a mail app.

Long story short: on the macbook i am having mailboxes/catalogues (in my primary email box), that i do not have on the server(email website login place). I thought that there is a problem with connection, so i removed and add mailbox - do not help. i still have folders on my macs mail, that my server do not see.

I thought that there is a connection problem, but i can send and receive emails very well.

I tried on different email app - thunderbird and it worked. Emails was downloaded just from server, without some strange mailboxes/catalogues that i see with my email app.

I tried to remove all files that i found in online helps from Libraries, but nothing helped. It s like the email app is holding information/files about my email and downloading it every time...

The worst part is, that i tried create a new user and the result was the same...its like somewhere mac os is having hidden files with my emails and mailboxes. Couldn't find it thought :(

Looking forward for any tips and help. Thank You!