relay6.recruitingmail.net has no MX records.
Question and response
Question
dig relay6.recruitingmail.net. MX
Answer
The response has no answer records.
Authority
recruitingmail.net. 86400 SOA ns1.markmonitor.com. hostmaster.markmonitor.com. 2026021302 7200 900 1209600 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0