MailCheckr tools

Explore your domain's mail setup.

Run a quick lookup to see the public records behind your email authentication and domain setup.

DMARC Checker

Review a domain’s DMARC policy and see how it handles mail that fails authentication.

Inspect which mail servers a domain authorizes to send on its behalf.

Look up a DKIM public key using a domain and selector to review signing setup.

Follow a hostname’s alias to its destination and check the published record.

See the mail exchangers and priorities published for a domain.

Explore the public DNS records behind a domain in one place.

MailCheckr's verification API already checks email addresses using multiple signals, including DNS and SMTP evidence.