dnsa.mojohost.com has no MX records.
Question and response
Question
dig dnsa.mojohost.com. MX
Answer
The response has no answer records.
Authority
mojohost.com. 60 SOA dnsa.mojohost.com. postmaster.mojohost.com. 2026021902 28800 3600 3600000 300
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0