hey sorry man I cant help much I just installed it
All I can say is check logs
ok I looked at putty and it just started installing ur service did it do this right
Trying to register service courier-imap... using /sbin/chkconfig
done
Starting Courier-IMAP server:
Starting imapd [ OK ]
generating-SSL-certificate...
Starting imap-ssl [ OK ]
Starting pop3 [ OK ]
generating-SSL-certificate... Starting pop3-ssl [ OK ]