Posts: 31,903
Thanks: 693
Thanked 4,193 Times in 3,211 Posts
If there is no entry for that domain, then the gmx server was not able to contact your server. This means that the problem is most likely outside of your server e.g. a firewall or router or postfix is not listening on the external network interface. Is the server located in a datacenter with a fixed IP address or is it hosted at home / in office on a dsl or bale line?
Recent comments
19 hours 27 min ago
1 day 2 hours ago
1 day 5 hours ago
1 day 7 hours ago
1 day 16 hours ago
2 days 1 hour ago
2 days 2 hours ago
2 days 5 hours ago
2 days 10 hours ago
2 days 10 hours ago