ns.2upost.com has no MX records.
Question and response
Question
dig ns.2upost.com. MX
Answer
The response has no answer records.
Authority
2upost.com. 10800 SOA ns.2upost.com. hostmaster.2upost.com. 2004073039 21600 1800 1209600 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0