mx2.infra.opensuse.org has no CNAME records.
Question and response
Question
dig mx2.infra.opensuse.org. NS
Answer
The response has no answer records.
Authority
infra.opensuse.org. 20829 SOA ns1.opensuse.org. admin.opensuse.org. 2026022601 7200 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0