How to transfer mail from a local folder to Yandex.mail?

Question

Email

The question arose here recently about transferring a domain and a mail account from one Yandex account to another with the preservation of all letters.
As a result of the manipulations, it turned out to make a backup of letters in thunderbird to the local area and recreate the domain mailbox on a new Yandex account. The mailbox is, of course, empty.
It is necessary to transfer the mail to the server, the thunderbird does not want to. fiddled with all the settings.
Help advice. It is necessary to transfer incoming and sent messages to the Yandex mail server from a local backup.

Answer 1

what do you mean he doesn't want to?
just select letters and copy them to another mailbox