mailkit.com has no AAAA records.
Apex domains cannot have CNAME records.
Google
Domain verification
google-site-verification=HA95TYHJj4Zn8vwPgZKANERYnAOCEHxD97T3pn7NH-g
Postman
Domain verification
postman-domain-verification=ea2b2be13b91bf8c0a6155f8a9f03d7ea9f6a308e67d2420afc1828e2b449489c0cafaca80b76f5795227ff1fed8b5060da323ba05a97fac9f3f231c533c343c
Slack
Domain verification
slack-domain-verification=pUOYBwmFYIPlJR65a8z4Wge46L6nWkEzzZTeEyz9
Yahoo
Domain verification
yahoo-verification-key=Bv8T/GK1eriMCuziFo+DkcK0XoXl3j8WCGE/DOJrUzI=
Zone apex
Start of authority
Email
Serial
2026030501
Refresh
1h
Retry
5m
Expire
14d
Negative cache TTL
1d