Free tool · no sign-up

Will your email land in the inbox?

Type your domain. We check the four records inboxes look at (mail server, SPF, DKIM and DMARC) and tell you in plain words what to fix.

Why these matter

Since 2024, Gmail and Yahoo require SPF or DKIM, plus DMARC, from anyone sending in bulk.
SPF lists the services allowed to send as you. One record, at most 10 lookups.
DKIM signs each email so inboxes know it wasn't changed or faked.
DMARC tells inboxes what to do when a message fails those checks.