nerv.st has no MX records.
Question and response
Question
dig nerv.st. MX
Answer
The response has no answer records.
Authority
nerv.st. 900 SOA ns1.hopnetworks.net. hostmaster.bunny.net. 2021683393 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0