Discover all DKIM selectors configured for a domain. We check 25+ common selector names used by popular email providers.
DKIM (DomainKeys Identified Mail) adds a digital signature to emails, allowing receivers to verify that the message wasn't altered and truly came from your domain.
Selectors are prefixes that identify which DKIM key to use. Common selectors include "google", "s1", "selector1", "k1", "default", and provider-specific names.
DKIM is essential for DMARC alignment and email deliverability. It helps prevent email spoofing and increases trust with email providers.
Google Workspace
googleMicrosoft 365
selector1, selector2SendGrid
s1, s2Mailchimp
k1, k2, k3Amazon SES
[random string]Postmark
pmPro Tip: To verify DKIM is working correctly, send a test email and check the headers for "DKIM=pass". Use our Email Checker to test your complete email authentication setup.