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sender example.name@example.com
subject This is example email
date June 9, 2026 at 2:29 PM

Significant deliverability issues. 5 critical things need attention before this mail will reach the inbox reliably.

Spam check score

35 / 100
High risk
  • Authentication 81%
    13 of 16 pts earned
  • Sender reputation 12%
    8 of 65 pts earned
  • Content quality 72%
    13 of 18 pts earned

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Fix these in order. Biggest impact first.

  1. 01 ⚡ High impact +58 pts if fixed IP Blacklists Your Mail Server IP address 203.0.113.50 is in significant blacklists. show details hide details

    Not only can your domain be blacklisted, but the IP address from which you send your emails can as well. If this "Mail Server IP" is blacklisted it can cause your messages to be rejected or flagged as spam. It is important to get delisted and identify the root cause of why you were listed.If you use any tools/softwares to send out emails, it is possible that the shared or dedicated IP address being used by these is on a blacklist. Certain blacklists can have a severe affect on the ability to reach the inbox. We have aggregated a list of ones known to be meaningful.

    blacklists listing your IP
    • IP Blacklist Check
      Your sending IP address is listed on one or more significant blacklists.
  2. 02 Low impact +5 pts if fixed HTML Body Best Practices Your message body is not using HTML best practices! show details hide details

    Your HTML body has a significant impact on whether or not your email will be marked as spam. HTML is parsed and evaluated by Email Service Providers to determine if it is following best practices that are favorably viewed when inboxing.

    • Link URL Sizes
      The HTML body includes links with URLs that are too much of length.
    • HTML Body Link Count
      The HTML body has many links that commonly found in spam messages.
    • Embedded HTML Elements
      The HTML is not loading any external elements, such as an iframe.
    • Spammy Language
      The message body does not contain many of the common spam phrases.
    • Obfuscated Text
      The HTML body has more than 5% obfuscated text.
    • HTML Elements
      The HTML body is composed of standard and supported HTML elements.
    • HTML Font
      The HTML font is bad readable or have not normal size.
    • HTML Tags
      The HTML body is composed of properly closed and nested tags.
    • Text to Image Ratio
      The HTML body text to image ratio is looks like spam messages.
    • Linked Image
      The HTML body are contain a linked image or the rest of the HTML body is small enough.
  3. 03 Low impact +2 pts if fixed DMARC Your DMARC authentication is not set up using best practices. show details hide details

    Without having a Requested Mail Receiver DMARC policy published, emails from your domain can be spoofed and sent on your behalf.

    existing dns record v=dmarc1; p=none; sp=quarantine; rua=mailto:reports@example.com
    • Existing DMARC DNS Record
      There is a DMARC DNS record for the appropriate domain.
    • DMARC Policy Tag
      DMARC policy is not enforced. Set the p= tag to quarantine or reject.
    • DMARC Version Tag
      The DMARC DNS record starts with a valid version tag.
    • Duplicate DMARC DNS Records
      There are no duplicate DMARC DNS records for the specified domain.
  4. 04 Low impact +1 pts if fixed List-Unsubscribe Header Your email is missing the List-Unsubscribe header. show details hide details

    Spam complaints are the #1 factor that will hurt your email deliverability. Including an easy unsubscribe mechanism effectively helps prevent these spam complaints. Email Service Providers and spam filters also view it favorably when they make inboxing decisions.

    • List-Unsubscribe header
      Your email is missing the List-Unsubscribe header.
  5. 05 Low impact +1 pts if fixed BIMI Brand Indicators for Message Identification allows domains with strong email authentication (DMARC enforcement) to publish a brand logo, which mailbox providers may display to recipients. show details hide details
    • Existing BIMI DNS Record
      Skipped. BIMI is only evaluated once the domain enforces DMARC (p=quarantine or p=reject).
    • BIMI Version Tag
      Skipped. The version-tag check requires an existing BIMI DNS record to parse.
    • BIMI Location Tag (Logo URL)
      Skipped. The logo-location check requires an existing BIMI DNS record to parse.
    • DMARC Enforcement
      Skipped. The DMARC enforcement check requires a published DMARC record and a BIMI record to evaluate together.
    • Optional Verified Mark Certificate (VMC)
      Skipped. The Verified Mark Certificate check requires an existing BIMI DNS record to parse.
  • SPF Your SPF record looks great!
    details hide

    A valid SPF record will prevent spammers from sending spam from your domain.

    • Existing SPF DNS Record
      There is a SPF DNS record published for the "from" domain.
    • Duplicate SPF DNS Records
      There are no duplicate SPF DNS records for the "from" domain.
    • SPF Authorization
      The sender is authorized to send emails from the domain.
    • SPF ?all Mechanism
      The SPF DNS record does not include the ?all mechanism.
    • SPF ptr Mechanism
      The SPF DNS record does not include the ptr mechanism.
  • DKIM Your email was signed with DKIM!
    details hide

    Publishing a DKIM key will reduce the likelihood of your messages being blocked or ending up in the spam folder. It will also prevent spoofing by adding a digital signature to your email headers.

    • Existing DKIM Signature
      The email is signed with DKIM, whether or not it is a valid signature.
    • Verified DKIM Signature
      The email is signed with a valid DKIM signature, whether or not it is from the correct sender domain.
  • Domain blacklists Your domain is not listed on any significant blacklists!
    details hide

    Certain blacklists can have a severe affect on the ability to reach the inbox. We have aggregated a list of ones known to be meaningful.

    • Domain Blacklist Check
      No significant blacklists are listing your domain.
  • Reverse DNS Your mail server Reverse DNS is properly configured.
    details hide

    Reverse DNS verifies that the sending IP address is correctly mapped to a hostname and resolves back to the same IP address (forward-confirmed reverse DNS). Major mailbox providers use this signal to identify legitimate mail servers.

    • Mail Server and HELO Alignment
      The Mail Server IP rDNS matches the HELO client-ip.
    • Mail Server Reverse DNS
      The sending IP address has a valid forward-confirmed reverse DNS record.
  • Domain Suffix Your domain uses a trustworthy suffix!
    details hide

    Certain domain suffixes are less likely to reach the inbox.

    current domain suffix
    .com
    • Domain Suffix Check
      Your domain suffix is considered trustworthy by spam filters.
  • Domain Age Your domain is mature!
    details hide

    The younger your domain is, the more difficult it is to attain a great domain reputation.

    current domain age 11258 days 369 months 30 years
    Conclusion: old
    • Domain Status
      The domain is not expired.
    • Domain Age
      The domain is old.
  • Subject Line Your subject line is following anti-spam best practices!
    details hide

    The subject line is parsed and analyzed by spam filters and can cause your email to miss the inbox.

    • Subject Line Gappy Text
      The subject line is not formatted using gappy text.
    • Subject Line Irregular Characters
      The subject line is composed of legitimate and accepted characters.
    • Subject Line Spam Language
      The subject line does not contain many of the common spam phrases.
    • To Address in Subject Line
      The subject line does not include the sent to email address.
    • Subject Line Obfuscation
      The subject line formatting is clear and not obfuscated.
  • Broken Links Your email has no broken links!
    details hide

    Having broken links in your email body can cause Email Service Providers to mark your message as spam.

    • Broken Links Check
      All links in the email body resolve successfully.
  • Body Blacklists Your email body does not include any blacklisted links!
    details hide

    Having a blacklisted link in your email body can cause your message to be flagged as spam or rejected.

    blacklisted links in the body
      • Body Blacklist Check
        None of the links in the email body appear on known blacklists.
    • Short URLs You are not using any dangerous short URLs!
      details hide

      Using shortened URLs to track receiver behavior can cause spam filters to flag your email.

      • Short URL Check
        No dangerous shortened URLs were detected in the email body.
    • SpamAssassin Your SpamAssassin score is safely below the spam threshold.
      details hide

      SpamAssassin is a widely used anti-spam platform and is a valuble proxy when gauging whether or not your email will be flagged as spam by major Email Service Providers.

      • SpamAssassin
        SpamAssassin assigned the email a score of under 5.0.
    • Accessibility Checking The HTML body has good accessibility
      details hide

      Accessibility check aimed at email marketing professionals and industry developers to give them an overview of their current level and possible improvements.

      • Accessibility Checking
        The HTML body has good accessibility
    • Passed: meets deliverability best practice.
    • Warning: a minor issue worth tightening, not a blocker.
    • Failed: likely to hurt inbox placement; worth fixing.
    • Not checked: skipped this run (often needs an HTML body, a published DNS record, or a paid feature).

    See where your email actually lands in real inboxes.

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