mailfilter-89-45-235-5.instance.cloud.sunet.se has no MX records.
Question and response
Question
dig mailfilter-89-45-235-5.instance.cloud.sunet.se. MX
Answer
The response has no answer records.
Authority
instance.cloud.sunet.se. 600 SOA ns1.safedc.net. hostmaster.safespring.com. 1771956771 7200 3600 864000 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0