billing.athome.pro has no MX records.
Question and response
Question
dig billing.athome.pro. MX
Answer
The response has no answer records.
Authority
athome.pro. 86400 SOA ns.gblnet.ru. noc.at-home.ru. 2026022102 21600 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0