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 github.com

Found 9 active selector(s).

SelectorProviderKey sizeStatus
google Google Workspace 2048 bits active
selector1 Microsoft 365 1024 bits active
s1 SendGrid 2048 bits active
s2 SendGrid 2048 bits active
smtpapi SendGrid 1024 bits active
k1 Mailchimp / Mandrill 1024 bits active
k2 Mailchimp / Mandrill 2048 bits active
k3 Mailchimp / Mandrill 2048 bits active
mailo Mailgun 1024 bits active