I am trying to get open SASL to work on CentOS 6.2. I followed this tutorial:
http://wiki.centos.org/HowTos/postfix_sasl
I suspect it works perfectly for CentOS 5.x so all I really need is an update for use on CentOS 6.2. I was feeling confident right up until I discovered half way through that dovecot.conf goes mad with these settings.
This link recommends that people running CentOS 6 use a different method.
http://wiki2.dovecot.org/HowTo/PostfixAndDovecotSASL
Neither of the methods outlined in these links work.
Also I don't know how to get Open-Xchange to use SMTP authentication. It seems to be very poorly documented and their CE forum is not letting me post, nor is it showing much activity at all.