Email Deliverability Tester
Check whether your domain's SPF, DKIM and DMARC records are set up correctly — the three records Gmail, Yahoo and Outlook now require before they'll reliably deliver your email to the inbox.
Check your domain
The domain you send email from — no https://, no www.
Not sure? Leave on auto-detect — it tries the most common ESP selectors for you.
SPF lists which mail servers are allowed to send email for your domain. DKIM attaches a cryptographic signature to each message so receivers can confirm it wasn't altered in transit. DMARC tells receiving mail servers what to do when a message fails SPF or DKIM — and sends you reports so you can see who's sending mail as your domain. All three are free DNS records; none require signup or software.