mx1.opensuse.org has no CNAME records.
Question and response
Question
dig mx1.opensuse.org. NS
Answer
The response has no answer records.
Authority
opensuse.org. 8583 SOA ns1.opensuse.org. admin.opensuse.org. 2026022601 7200 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0