eu.mailgun.org has no AAAA records.
Apex domains cannot have CNAME records.
Yahoo
Domain verification
yahoo-verification-key=PcloW6iwURmIi0STlYXkAaHwcxLDeAzVreCM+CPCAeU=
95jjgg5fltg8lypmhs7vt85ntc6349p1
_khfu9yi87mecnkfvd0agoi6mnibmj6l
ns-1452.awsdns-53.org
Amazon Web Services
Route 53
ns-2026.awsdns-61.co.uk
Amazon Web Services
Route 53
ns-508.awsdns-63.com
Amazon Web Services
Route 53
ns-619.awsdns-13.net
Amazon Web Services
Route 53
Zone apex
Start of authority
Email
Serial
2
Refresh
2h
Retry
15m
Expire
14d
Negative cache TTL
1d