regdns2.net has no MX records.
Question and response
Question
dig regdns2.net. MX
Answer
The response has no answer records.
Authority
regdns2.net. 86400 SOA anycast.regdns1.de. hostmaster.internetwire.de. 2019022502 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0