*) It's recommended to use Dovecot-2.2 for dsync, it fixes many bugs for dsync.
*) Yes you can use Dovecot RPMs provided by atrpms. The one in iRedMail yum repository comes from ATrpms too.
Well ok, thanks for the reply above. I downloaded dovecot-2.2.10-1_14.el6.x86_64.rpm, dovecot-managesieve-0.4.2-32.1.el6.x86_64.rpm and dovecot-pigeonhole-0.4.2-32.1.el6.x86_64.rpm but trying to install them I got missing perl and several dependencies problems (dovecot-mysql and dovecot-pgsql). I installed perl-JSON-XS through yum, however trying to rpm -ih I had both dependencies and conflicts. How safe is it to override them with --nodeps --force? I am afraid nothing will be working after... I also didn't manage to find packages dovecot-mysql and dovecot-pgsql from the atrpms website...
What do you advise?