Free tools
DKIM & DMARC Checker
Check a domain's DMARC policy and its DKIM signing keys. Leave the selector blank and we'll try the common ones for you.
Lookups run in your browser against public DNS (dns.google). Nothing is sent to or stored by MailCraft.
Why both?
DKIM signs each message so receivers can prove it wasn't altered; DMARC tells them what to do when SPF or DKIM fails, and sends you reports. Gmail and Yahoo require both for bulk senders. Read the authentication guide →