mail2.bearstech.com has no MX records.
Question and response
Question
dig mail2.bearstech.com. MX
Answer
The response has no answer records.
Authority
bearstech.com. 300 SOA ns1.bearstech.net. admin.bearstech.com. 2026022301 1800 1800 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0