I'm running openxchange hyperion on ubuntu 7.10, installed with the community installer (thanks to martin for this great tool).
As i'm running it on my private server pc at home, i've got no static ip-adress but i'm using dyndns.org for this reason.
Now my problem: i could send emails to every email adress (internet and private network) but could just receive mails from inside my home-network.
The settings in the admin-gui under configuration-->mailserver are:
Domain: xyz.selfip.org (DYNDNS-Domain, of course not my real one )
Relayhost: nothing (empty field)
Trusted Network: 127.0.0.0/8, 192.168.0.0/24
Enable Mailscanner: no
As I am no experienced Linux User with nearly no experience with setting up (mail-)servers, i am hoping that you could help me. would be nice if someone has an answer.