2.1 to 2.2.31 on new server?

I have a Centos 6 server with Dovecot 2.1.17/mysql/virtual domains

I'm setting a new Centos 7 server, and, aim to install 2.2.31 from Ghetoforge

dumb question, can I install 2.3 on new server, then, copy old /etc/dovecot tree to new /etc/dovecot ?

appreciate any tips and advice,

V