I have built a new server (FreeBSD-12) running dovecot-2.3.4.
My old server (FreeBSD-9.3) is running dovecot-2.3.4 as well.
The configurations are 1:1 identical.
The are about 250 users on this server, all virtual. They are mostly POP3 users, but they do "leave a copy of message on the server"
for set various number of days.

Now, to migrate the mail data, can I simply rsync the mail directories between the old and the new server? Would that create a pitfall??

What is the recommended method?

--
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254 7 3200 0004/+254 7 2274 3223
"Oh, the cruft.", grep ^[^#] :-)