rsync /old/server new/server ?

[Voytek Eymont via dovecot]

I have Centos 7 with dovecot/postfix/mysql Maildir

I want to bring in a new server, new server will have same hostname as
current, but, different IP

I was intending to
rsync -avzhe ssh  vmail@oldserver:/var/vmail/vmail1  /var/vmail/vmail1

and, then, re run as necessary when/if mail still arrives on old server

is that "a good plan" ...?

TIA, V