s8.vonderste.in has no MX records.
Question and response
Question
dig s8.vonderste.in. MX
Answer
The response has no answer records.
Authority
vonderste.in. 1800 SOA chloe.ns.cloudflare.com. dns.cloudflare.com. 2397500714 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0