a.dns.tele2.net has no MX records.
Question and response
Question
dig a.dns.tele2.net. MX
Answer
The response has no answer records.
Authority
tele2.net. 3600 SOA kista.dns.swip.net. registry.swip.net. 2026041801 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0