mail-exchange.services has no MX records.
Question and response
Question
dig mail-exchange.services. MX
Answer
The response has no answer records.
Authority
mail-exchange.services. 900 SOA ns014.paragon-cc.de. ddi-pl.atos.net. 2 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0