Mail migration / dsync

Casey Stone
Wed, 25 Feb 2015 20:53:26 -0000

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: