Note that the priority 20 MX for NOC.NET.ER does not appear to listen on port 25 - possibly this is in place for DR contingency.
$TTL 86400 @ IN SOA sawa.noc.net.er. hostmaster.noc.net.er. ( 2006080701 ; Serial 7200 ; Refresh 2 hours 3600 ; Retry 1 hour 1814400 ; Expire 21 days 172800 ) ; Minimum 48 hours IN NS ns.ripe.net. IN NS ns0.punchdown.org. IN NS ns1.punchdown.net. IN NS sawanew.noc.net.er. IN NS zaranew.noc.net.er. eritel IN NS ns0.punchdown.org. eritel IN NS ns1.punchdown.net. eritel IN NS sawanew.noc.net.er. noc IN MX 10 nocweb.noc.net.er. noc IN MX 20 zaranew.noc.net.er. noc IN MX 30 mail.punchdown.org. noc IN NS ns0.punchdown.org. noc IN NS ns1.punchdown.net. noc IN NS sawanew.noc.net.er. noc IN NS zaranew.noc.net.er. sawanew.noc IN A 196.200.96.1 zaranew.noc IN A 196.200.96.2
2007-12-30 RB