cust.tele2.se has no MX records.
Question and response
Question
dig cust.tele2.se. MX
Answer
The response has no answer records.
Authority
cust.tele2.se. 86400 SOA kista.dns.swip.net. hostmaster.tele2.com. 2026021113 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0