otherguy.gte.net has no MX records.
Question and response
Question
dig otherguy.gte.net. MX
Answer
The response has no answer records.
Authority
gte.net. 86400 SOA ns1.verizon.net. dns.verizon.com. 2026012301 86400 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0