mastercard.eu has no MX records.
Question and response
Question
dig mastercard.eu. MX
Answer
The response has no answer records.
Authority
mastercard.eu. 300 SOA dns1.mastercard.com. hostmaster.mastercard.com. 2022071255 14400 3600 2419200 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0