DKIM Selector Finder

Probes 50+ known ESP selectors in parallel and reports which ones resolve.

Try: google.com github.com microsoft.com
Recent:

Probed 56 selectors against google.com

Found 3 active selector(s).

SelectorProviderKey sizeStatus
20210112 Google Workspace (rotating) ? bits revoked
20230601 Google Workspace (rotating) ? bits revoked
20161025 Postmark ? bits revoked