dovecot - Feb 2015 - Mail migration / dsync

Hello,

I am trying to migrate emails
from: Mountain Lion OSX 10.8.5 (dovecot: 2.0.19apple1)
to: RHEL 7.0 (dovecot: 2.2.10)
Using command: dsync -m 
/Library/Server/Mail/Data/mail/XYZWXYZW-XYZW-XYZW-XYW-XYZXYZXYZXYZ/ -u 
giedriust mirror giedriust at 192.168.xx.xx
root at 192.168.xx.xx's password:
dsync-remote(giedriust at domainname.com): Error: dsync(local): Remote 
dsync doesn't use compatible protocol
dsync-remote(giedriust at domainname.com): Error: dsync(local): Remote 
dsync doesn't use compatible protocol
dsync-local(giedriust): Error: Invalid server handshake: VERSION 
dsync    3    2


Is there a way to synchronise all the emails and convert them from 
simple Maildir to Maildir (layout=fs) format?

-- 
*
Giedrius Tuminauskas*

I'm not an expert, but I just gave a similar answer to someone else in a
similar situation (significantly older dovecot version on old server) and I
suggest trying to use doveadm backup on the new server to pull the mail from the
old server via IMAP like:

doveadm -o imapc_features=fetch-headers -o mail_prefetch_count=20 -o
imapc_port=993 -o imapc_ssl=imaps -o imapc_ssl_verify=no -o mail_fsync=never -o
imapc_host=mail.example.com -o imapc_user=mailuser at exmple.com -o
imapc_password=123456 backup -R imapc: