I am running ISPconfig 2.2.7, recently upgraded. Server is Ubuntu 6.06, set up using the Perfect Setup. Mailclient used is Thunderbird 18.104.22.168. Webmail used is Roundcube (.pkg install from the ISPconfig website). Problem: When using a mail client from outside my LAN I'm getting the message that the connection is refused by my SMTP server. Webmail works, and I have not been fiddling with main.cf since I got it to work back in June. As far as I know this problem does not occur using a mailclient inside my LAN. Connecting to my SMTP server (port 25) via telnet also does not work. Any ideas what may be the solution?