I'm sorry, i mean should i open port 587 and 465 in Extenal Firewall ?. In my Extenal Firewall ( Fortinet ) i open port:
25/tcp open smtp
80/tcp open http
110/tcp open pop3
119/tcp open nntp
143/tcp open imap
In my kloxo server mail i open all port before. Beside, i think have a lot webmail application no good for me because i only use Roundcube. After i reinstall qmail follow this thread:
http://forum.mratwork.com/kloxo-mr-technical-helps/always-full-of-ram-because-qmail-service/
i can't change webmail application default to Roundcube.
