Im using a openfire server, i use this to login into admin panel http://51.15.181.119:9090 but when i try to do it with my domain it doesnt work http://anonmail.su:9090

Anyone could explain me why and how can i solve it?
This are my DNS setup:

$ORIGIN anonmail.su.
$TTL 1800
anonmail.su. IN SOA ns1.digitalocean.com. hostmaster.anonmail.su. 1514672771 10800 3600 604800 1800
anonmail.su. 1800 IN NS ns1.digitalocean.com.
anonmail.su. 1800 IN NS ns2.digitalocean.com.
anonmail.su. 1800 IN NS ns3.digitalocean.com.
anonmail.su. 3600 IN A 51.15.181.119
www.anonmail.su. 3600 IN A 51.15.181.119
_xmpp-client._tcp.anonmail.su. 18000 IN SRV 0 5 5222 anonmail.su.
_xmpp-server._tcp.anonmail.su. 18000 IN SRV 0 5 5269 anonmail.su.