dns4.itconnection.se has no MX records.
Question and response
Question
dig dns4.itconnection.se. MX
Answer
The response has no answer records.
Authority
itconnection.se. 600 SOA dns1.itconnection.se. registry.itconnection.se. 1564548822 3600 1200 1209600 7200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0