asgard.strueker.net has no MX records.
Question and response
Question
dig asgard.strueker.net. MX
Answer
The response has no answer records.
Authority
strueker.net. 1800 SOA mario.ns.cloudflare.com. dns.cloudflare.com. 2396932203 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0