3g.beeline.ru has no MX records.
Question and response
Question
dig 3g.beeline.ru. MX
Answer
The response has no answer records.
Authority
beeline.ru. 43200 SOA ns1.beeline.ru. mgribkov.beeline.ru. 2025031524 1200 120 864000 43200
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0