gotdns.com has no MX records.
Question and response
Question
dig gotdns.com. MX
Answer
The response has no answer records.
Authority
gotdns.com. 1800 SOA ns1.dyndns.org. hostmaster.dyndns.org. 2203457341 10800 1800 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0