ns1.exoscale.ch has no MX records.
Question and response
Question
dig ns1.exoscale.ch. MX
Answer
The response has no answer records.
Authority
exoscale.ch. 1800 SOA buck.ns.cloudflare.com. dns.cloudflare.com. 2398586309 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0