Is there a solution for offline mail navigation?

Question

Email

It is required to download all the content from the mail service and store it with the entire structure of folders and letters as is, it will be used only as a reference and nothing more. Download is not a problem. But how is it more convenient to store, so that with a search, etc.? Those. not locally on the computer, but on some server, but with access via the web.

Answer 1

Good afternoon!
Download to mail ru for business, free dimensionless mailboxes, it is possible to migrate mail with the entire structure of folders and letters via IMAP

Answer 2

The format https://ru.wikipedia.org/wiki/Mbox is understood by different email programs.
For example, you can initially download via Mozilla Thunderbird - and it will be immediately in an mbox file.
Or downloaded by some Outlook to convert to mbox.
And already mbox can be slipped into some Linux imap-server.