How to correctly set up iCloud mail in Thunderbird?

Question

Email

I set up a mail record according to the instructions .
I got this picture:

The Deleted and Sent folders are empty and not active, although they contain letters on the server. Letters arrive in the inbox, are marked as read, but are not deleted:

When sending a letter via Thunderbird, an additional Sent folder is created on the server and it is placed there.
What's the matter, and how to be?

Answer 1

1. On the account, click subscribe https://s.mail.ru/14Q1/uSttYs2kw in the right-click menu, make sure that all the necessary folders from the server are selected. If the desired folder is not there, then check in the icloud settings whether there is a parameter to give / not to give folders.
2. Restart Thunderbird (it sometimes glitches after adding an IMAP account)
3. On the account, click "Settings" on the right mouse button https://s.mail.ru/8pQp/zvubjeGK8 there
in the "Server Options" menu, select the location of the folder for remote emails
in the "Copies and folders" menu, select the location of the Sent, Drafts, Archive, Templates folders
in the "Anti-spam filter" menu, select the location of the spam folder