Imapsync migrating to a new server
From Zarafa wiki
To migrate mail from an old mailserver to a new Zarafa server you can use the tool imapsync. Requirements are that your old mailserver supports IMAP, and that the Zarafa gateway is running, with IMAP support enabled.
The syntax to use:
imapsync --noauthmd5 --host1 mail.old --user1 userold --password1 passw1 -sep2 / --prefix2 "" --host2 zarafa.new --user2 usernew --password2 passw2
Description of the extra options:
The option --noauthmd5 to use an other authentication system The option --sep2 / is to define the used separator for zarafa The option --prefix2 "" To define the basic start map
Note: The password is plain text and is readable, to change this, it is possible to use ssl, when you put in extra options (Read: man imapsync)