I have installed an SBS 2008. Everything seems to work ok except external email.
Internal Mail works ok
Accepted domain configured
Email Policy Configured.
Firewall is Off
Accepting email on Port 25
(now i have a catch all account doing pop3) Error is giving is 421 4.4.1
either with small or large emails. no email is received
When doing telnet servername 25 – it works ok. any command i type i get the 421 4.4.1 connection timeout. Please this is urgent if someone could help