Free Tool
Email Health Score
Test your email deliverability. Send a test email and get a detailed score with SPF, DKIM, DMARC, spam analysis, blacklist checks, and best practices.
Click below to generate a unique test email address. Then send an email to it from your mail system.
What is Email Deliverability?
Email deliverability is the ability of your emails to successfully reach your recipients' inboxes rather than being filtered into spam folders or rejected entirely. It depends on a combination of technical configuration, sender reputation, and content quality.
When you send an email, the receiving mail server performs dozens of checks: Is the sending server authorized (SPF)? Is the email signed (DKIM)? Does the domain have a DMARC policy? Is the sender IP blacklisted? Does the content look like spam? Each of these factors contributes to whether your email lands in the inbox or spam.
Our Email Health Score runs all of these checks against a real email you send, giving you an accurate picture of how your emails will be treated by major email providers like Gmail, Outlook, and Yahoo.
How to Improve Your Score
- Set up SPF, DKIM, and DMARC -- These three authentication protocols are the foundation of email deliverability. Without them, your emails are far more likely to be flagged as spam.
- Include both HTML and plain text -- Use multipart/alternative MIME structure so email clients can render whichever format they prefer.
- Add List-Unsubscribe header -- Required by Gmail and Yahoo for bulk senders. Makes it easy for recipients to unsubscribe, which reduces spam complaints.
- Monitor blacklists -- Regularly check if your sending IPs are listed on DNS blacklists. Get delisted promptly if you find any listings.
- Use TLS encryption -- Ensure your mail server supports TLS for secure email delivery. Most modern providers require or prefer encrypted connections.
Protect your email reputation at scale
Validate email addresses before they hit your list. Detect disposable emails, verify domains, and prevent fake signups with our API.