Imapsync

Best tool to move messages from one email account to another one

best with docker

docker pull gilleslamiral/imapsync 

then move message to a subfolder

 docker run gilleslamiral/imapsync imapsync \ 

--host1 imap.mailserver1.com   --user1 user@mailserver1.com --password1 'passwordmailserver1' \ 

--host2 imap.mailserver2.com   --user2 user@mailserver2.com --password2 'passwordmailserver2' \ 

--subfolder2 subfoldermailserver2 

source: https://imapsync.lamiral.info/README