A Jackson : are you sure of that, so it isn't your DNS server which can't handle SRV-records, i have bad experience with FON routers and theirs DNS servers and SRV records. Try to change to an reliable DNS server.
otherwise try to use dig if you can resolve a SRV record
dig +short _xmpp-server._tcp.yourhost.com. SRV
A Jackson : are you sure of that, so it isn't your DNS server which can't handle SRV-records, i have bad experience with FON routers and theirs DNS servers and SRV records. Try to change to an reliable DNS server. _tcp.yourhost. com. SRV
otherwise try to use dig if you can resolve a SRV record
dig +short _xmpp-server.