nscloud1.redirect.pizza has no MX records.
Question and response
Question
dig nscloud1.redirect.pizza. MX
Answer
The response has no answer records.
Authority
redirect.pizza. 1800 SOA ns1.enflow.nl. hostmaster.enflow.nl. 1646682907 10800 3600 604800 1800
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0