not sure if your problem same as mine, but i also installed FBSD9.1 with postfix and dovecot, and got issue during installation, postfix can't install.
After correct the /etc/make.conf, it can install, but can't receive mail.
To fix that, i put this option into main.conf:
Code:
smtpd_sasl_type = dovecot
But now, i am facing the issue with sending and WWW error.