rev.nessus.at has no MX records.
Question and response
Question
dig rev.nessus.at. MX
Answer
The response has no answer records.
Authority
rev.nessus.at. 3600 SOA ns1.nessus.at. domain-admin.nessus.at. 2025111899 3600 1800 1814400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0