The observed collection
Observed DNS technologies
These pages report DNS evidence from a selected watchlist. Mail routing, sender authorization, web routing and verification markers are separate evidence types. They are never treated as equivalent proof of a product installation.
dmarc policy
DMARC policy
6 observed domains
domain verification
Google domain verification
6 observed domains
domain verification
Zoom domain verification
4 observed domains
domain verification
Atlassian domain verification
3 observed domains
spf authorization
Google sender authorization
3 observed domains
mx routing
Google Workspace MX
3 observed domains
domain verification
HubSpot developer verification
3 observed domains
domain verification
Apple domain verification
2 observed domains
domain verification
Meta domain verification
2 observed domains
domain verification
Microsoft domain verification
2 observed domains
nameserver routing
Cloudflare nameservers
1 observed domains
nameserver routing
DigitalOcean nameservers
1 observed domains
mx routing
Proofpoint mail gateway
1 observed domains
mx routing
Proton Mail MX
1 observed domains
spf authorization
Salesforce sender authorization
1 observed domains
spf authorization
SendGrid sender authorization
1 observed domains
spf authorization
Zendesk sender authorization
1 observed domains
Counts cover a selected watchlist. They do not estimate total market share or confirm a paid installation.