a2.nic.red has no MX records.
Question and response
Question
dig a2.nic.red. MX
Answer
The response has no answer records.
Authority
nic.red. 300 SOA a0.nic.red. alerts.afilias.info. 1771961595 86400 7200 300000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0