Is missing email authentication hurting your deliverability?

DMARC report monitoring and email deliverability tools. No IT expertise required.

Benefits

One platform for managing email authentication across all your domains

Compliance

Meet Google & Yahoo! Sender Requirements

Satisfy Google and Yahoo bulk sender requirements with guided DMARC, SPF, and DKIM setup that keeps your domain ready to send.

Zero-Code Setup
Copy and paste the exact DNS records you need with guided setup. No IT expertise required.
Validator
Run a comprehensive validation suite to confirm your DMARC, SPF, and DKIM setup is fully aligned.
Continuous scanning
Hourly scans catch DNS or authentication issues before they turn into deliverability problems.
Sender Requirements Validator
DMARC Checks: 11/11
SPF Checks: 12/12
DKIM Checks: 4/4
Bulk Sender Status
Google logoPass
Yahoo logoPass

Enforce

Prevent domain impersonation

See who is abusing your domains, understand the risk, and move to enforcement with clear delivery estimates before you publish changes.

Analytics Dashboard
Understand which domains are being abused, where abuse is coming from, and how much volume is at risk.
Upgrade Wizard
Upgrade your DMARC policy toward reject with an estimated delivery impact before you enforce it.
Report Enrichment
Layer in abuse scores and message classification so you can separate real senders from spoofing noise.
Upgrade Wizard
v=DMARC1; p=reject; rua=mailto:demo@dmarcdefender.io
213
Threats Blocked

Deliverability

Improve Deliverability

Keep every sending platform authenticated so campaigns keep sending while unauthorized or misconfigured sources stand out fast.

Auto-discover Sending Tools
See every platform sending emails on your behalf, automatically mapped out.
Fix Wizard
Automatically detect and recommend fixes for your sending channels.
Notify on misconfiguration
Get alerted when an authorized sender falls out of compliance so you can fix it before it impacts your campaigns.
Fix Wizard

Detected senders that need fixes for SPF or DKIM.

SourceDomainVolumeSPFDKIM
HubSpot
HubSpot
acme.com42,180
SendGrid
SendGrid
marketing.acme.com18,240
Mailchimp
Mailchimp
outbound.acme.com9,870

BIMI

Display your brand in the inbox

Turn BIMI into a repeatable brand channel with the tools to host assets, convert files, and manage records in one place.

Hosting
Meet BIMI hosting requirements like TLS, caching, and permanence without relying on a separate asset workflow.
File Conversion
Convert existing SVG files into BIMI-compatible Tiny 1.2 P/S format with built-in tooling.
Policy Manager
Set up and manage your BIMI record with the policy wizard.
LOGO

Acme Product

hello@acme.com

Welcome to Acme! Do you like our logo that just says logo?

9:41 AM

How It Works

One DNS change away

Installing is as simple as copy and pasting a DNS record. Then we get to work to collect and aggregate your DMARC XML reports so you can see your sender health in one place and keep your legitimate email flowing.

Step 1

Update DNS

We update your DMARC record to point to our report collection infrastructure.

_dmarc.yourdomain.com

v=DMARC1; p=reject; rua=mailto:demo@in.dmarcdefender.io

Step 2

Aggregation Reports

Email servers such as Google, Yahoo, Microsoft, and other providers send us your DMARC XML aggregate reports.

google.xml
yahoo.xml
microsoft.xml

Step 3

Insights

We analyze the DMARC reports and provide insights and recommendations.

97%
3%
Deliverability

Features

All the tools you need

DMARC reports arrive from Google, Yahoo, and Outlook. Passing reports are green; a failed report triggers a red alert.

DMARC Monitoring

Monitor every sender using your domain to spot authentication issues before deliverability suffers.

Docs
An SPF policy with too many include lookups is flattened into IP addresses, changing from Over 10 SPF lookup limit to All Checks Passed.

SPF Flattening

Keep your SPF record within DNS lookup limits as your approved sending services grow.

Docs
Three emails travel across an encrypted delivery route. Two have green locks; one has an open red lock and a TLS failure alert.

TLS-RPT Monitoring

Track TLS delivery failures and certificate issues that can interrupt encrypted email.

Docs
A cloud hosts an MTA-STS policy for _mta-sts.yourdomain.com, enforcing encrypted email delivery.

MTA-STS Hosting

Publish and host your MTA-STS policy without maintaining extra infrastructure.

Docs
Your brand logo is served from cloud hosting and appears beside your sender name in an email header.

Hosted BIMI Assets

Host and manage your BIMI logo and certificate assets.

Docs
SPF and DKIM DNS records are monitored. If a DKIM record disappears, monitoring generates a missing-record alert.

SPF & DKIM Monitoring

Catch DNS changes and track usage of SPF mechanisms and DKIM keys.

Docs

FAQ

Frequently asked questions

Stuart, founder of DMARC Defender

Stuart Larsen

Founder / CEO

Still Have Questions?

Hi, I'm Stuart, founder of DMARC Defender. I'm been building and securing products for 20 years. I'm also founder of Csper, and was previously a security engineer at Yahoo! & MongoDB.

Please reach out if you have any questions or comments, I'm here to make sure your DMARC journey goes smoothly!

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Ready to get started?

Start your free trial today and see how DMARC Defender can help you improve your email deliverability and protect your brand reputation.

Start 14 Day Free TrialPricing

Benefits

  • Continuous deliverability monitoring
  • Fulfil Google/Yahoo sender requirements
  • Prevent Brand Impersonation
  • Improve Deliverability