_relay.anubisnetworks.com has no MX records.
Question and response
Question
dig _relay.anubisnetworks.com. MX
Answer
The response has no answer records.
Authority
anubisnetworks.com. 600 SOA ns11.anubisnetworks.com. hostmaster.anubisnetworks.com. 2025012420 7200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0