prime.presator.com has no MX records.
Question and response
Question
dig prime.presator.com. MX
Answer
The response has no answer records.
Authority
presator.com. 3600 SOA ns1.name.com. hostmaster.nsone.net. 1757686642 43200 7200 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0