Free Tool

Email Deliverability Checker

Check your domain's SPF, DKIM and DMARC records. Misconfigured email authentication is the #1 reason legitimate emails land in spam.

Email authentication check passing SPF, DKIM and DMARC verification

What these records do

SPF lists the servers allowed to send email for your domain. DKIM adds a cryptographic signature proving the message wasn't altered. DMARC ties SPF & DKIM together and tells receivers what to do with mail that fails — plus sends you reports. Gmail and Yahoo now require all three for bulk senders.

Common fixes

Publish exactly one SPF record ending in ~all or -all.
Enable DKIM signing in your mail provider and publish its selector TXT record.
Add a DMARC record at _dmarc.yourdomain.com, starting at p=none then tightening to quarantine/reject.