messagelabs.com has no AAAA records.
Apex domains cannot have CNAME records.
Google
Domain verification
google-site-verification=S-Nr15RcxzzgGYMEhh2KDVPir-reUlbqVHUHOPZR7Q0
Microsoft
Domain verification
MS=ms81732447
Microsoft
Domain verification
MS=ms85395953
ess-ac=80--4352
ns-1296.awsdns-34.org
Amazon Web Services
Route 53
ns-1714.awsdns-22.co.uk
Amazon Web Services
Route 53
ns-453.awsdns-56.com
Amazon Web Services
Route 53
ns-520.awsdns-01.net
Amazon Web Services
Route 53
Zone apex
Start of authority
Email
Serial
1
Refresh
2h
Retry
15m
Expire
14d
Negative cache TTL
1d