Connection Refused

[Mark]

I have dovecot, postfix and mailscanner. Everything runs fine, as soon i 
stop postfix and start mailscanner, no email comes through.
if i go to http://www.dnsqueries.com

and check my domain i get the follow error
under: Connect to mail servers
error: Failed to connect to mail.example.com.: Connection refused 
(Timeout was 5secs)

if I stop mailscanner and only run postfix alone, everything works again.

os: debian whezzy.

I see no erros in the log file everything looks peachy so no clue whats 
wrong

i have the same installation under fedora 15, and there all runs fine.