_spf.sunet.se has no MX records.
Question and response
Question
dig _spf.sunet.se. MX
Answer
The response has no answer records.
Authority
sunet.se. 300 SOA hidden-master.sunet.se. hostmaster.sunet.se. 2026022201 14400 3600 864000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0