nameservice.at has no MX records.
Question and response
Question
dig nameservice.at. MX
Answer
The response has no answer records.
Authority
nameservice.at. 3600 SOA ns1.nameservice.at. domainadmin2.magenta.at. 2026011710 86400 7200 2592000 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0