post.safemailglobal.com has no MX records.
Question and response
Question
dig post.safemailglobal.com. MX
Answer
The response has no answer records.
Authority
safemailglobal.com. 1800 SOA dns1.siel.si. dns.siel.si. 45 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0