Question and response
Question
dig mail.telekom.net. NS
Answer
mail.telekom.net. 5 CNAME mx-01.mail-forwarder.io.
Authority
mail-forwarder.io. 433 SOA ns-590.awsdns-09.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0