relay001.btactic.net has no MX records.
Question and response
Question
dig relay001.btactic.net. MX
Answer
The response has no answer records.
Authority
btactic.net. 86400 SOA dns17.ovh.net. tech.ovh.net. 2026022000 86400 3600 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0