safemail.kpn.com has no MX records.
Question and response
Question
dig safemail.kpn.com. MX
Answer
The response has no answer records.
Authority
safemail.kpn.com. 3600 SOA ns1.kpn.net. zonemaster.kpn.com. 2026022601 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0