How to migrate from Zimbra?

Question

Zimbra

There is a mail server on the local, we use Zimbra
Soon this server will not be and we need to move to another corporate mail.
I came up with the idea to blame the business acc mail and everything would be fine, only migrating from zimbra, dragging all the letters with me, does not work.
It works on pop3, through port 110, during migration, all data is specified correctly, only neither mail, nor Yandex, nor any other mailer can connect to the specified server and pull mail from there.
What can be wrong? Tell me where to dig, maybe reconfigure in zimbra or in dns, or with zimbra such a migration can not be implemented at all?

Answer 1

dig here docs.zimbra.com/docs/ne/6.0.8/administration_guide
...
https://imapsync.lamiral.info/
if you don't believe the utility - you can make a script in Python
, strictly speaking in Python, you can and the migrator immediately into where you like, with a converter via IMAP, but I still think Zimbra should have IMAP