Email Deliverability Tester
Run a full email configuration scan. Check MX, SPF, DMARC, DKIM, and blacklists — all in one shot.
What This Scan Checks
- MX Records — Are mail servers configured? Priority order?
- SPF Record — Is there a valid SPF TXT record? Does it include all sending servers?
- DMARC Policy — Is DMARC set up? What's the policy (none/quarantine/reject)?
- DKIM — Does the domain have a DKIM public key for the specified selector?
- MTA-STS — Is SMTP transport security enforced?
- BIMI — Is a BIMI record present for brand logo in email?
Why Email Deliverability Matters
Even perfectly written emails end up in spam when email authentication is misconfigured. SPF, DKIM, and DMARC together form the core of email authentication. Gmail, Outlook, and Yahoo all check these records before deciding where your email lands.
Google and Yahoo now require DMARC for bulk senders. Without it, emails to Gmail may be rejected or quarantined regardless of content.
Frequently Asked Questions
Common causes: missing or failing SPF, no DMARC policy, DKIM signature failure, sending IP on a blacklist, or poor sender reputation. Run this scan to identify specific issues.
SPF (Sender Policy Framework) is a DNS TXT record specifying which mail servers can send email for your domain. Example: v=spf1 include:_spf.google.com ~all. Without SPF, anyone can spoof your domain.
DMARC tells email receivers what to do with messages that fail SPF or DKIM: p=none (monitor), p=quarantine (spam folder), or p=reject (block entirely). It also enables reporting so you can see who's sending email as your domain.
DKIM adds a cryptographic signature to outgoing emails. The receiving server verifies it against your DNS public key, proving the email wasn't modified in transit and came from your domain.
1) Add a valid SPF record. 2) Enable DKIM on your email platform. 3) Set up DMARC (start with p=none, then tighten). 4) Check sending IPs against blacklists. 5) Keep bounce rates low and engagement high.