ns4.AN-NET.RU has no MX records.
Question and response
Question
dig ns4.AN-NET.RU. MX
Answer
The response has no answer records.
Authority
an-net.ru. 3600 SOA ns2.an-net.ru. noc.an-net.ru. 2025082700 3600 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0