Thanks - On Tue, Jan 15, 2013 at 2:10 PM, John Doe <jdmls at yahoo.com> wrote: > Tried both MXs and none answered... > > $ telnet static.103.78.9.176.clients.your-server.de 25 > Trying 176.9.78.103... I've opened the firewall for 176.9.78.103 only sofar... (doing hosts one by one). Is mayb postfix listening for local connections only in the default CentOS 6 install? I see: # netstat -an |grep -w 25 tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN Thanks Alex