To work with SSL in ISPConfig, or under firewall you need activate the nexts ports:
IMAPSSL 993 tcp yes
SMTPDSSL 465 tcp yes
POP3SSL 995 tcp yes
I worked, read, and practiced hard the last nights, to doing it. I'm had problem to access to IMAP SSL, I bad thinking are a problem of openssl or courier imap, but not, my problem are the firewall... I solved now...
Originally Posted by falko
Please comment out these two lines in your master.cf:
#smtps inet n - - - - smtpd
# -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes
and restart Postfix. It will make Postfix listen on port 465.