mx1.spamcontrol.gr has no CNAME records.
Question and response
Question
dig mx1.spamcontrol.gr. NS
Answer
The response has no answer records.
Authority
spamcontrol.gr. 6112 SOA ns1.spamcontrol.gr. info.spamcontrol.gr. 2025040401 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0