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DMARC Record Checker

DMARC for Small Business

Simple guide to email authentication for small businesses. Protect your domain from spoofing and ensure your emails reach customers.

You run a small business. You send email to customers, vendors, and partners every day. When those emails land in spam—or when scammers send fake emails pretending to be you—it hurts your business.

DMARC protects your domain and ensures your emails get delivered. And it's simpler to set up than you might think.

Why Small Businesses Need DMARC

You might think email security is only for big companies. It's not.

Small businesses are targets too:

  • Scammers spoof small business domains for phishing
  • Your customers trust emails "from" you
  • One successful scam damages your reputation
  • You may not even know it's happening

Email deliverability matters:

  • Invoices that land in spam don't get paid
  • Proposals that go to junk get ignored
  • Customer service replies that never arrive frustrate clients

It's now required: Google and Yahoo require DMARC for bulk senders. Even if you don't send thousands of emails, proper authentication improves deliverability.

Gmail, Yahoo, and other providers give preference to properly authenticated email. Without DMARC, you're at a disadvantage.

What DMARC Does for You

DMARC does two things:

  1. Tells email providers what to do when someone tries to send fake email using your domain
  2. Sends you reports about who's sending email as your domain

With DMARC set to "reject," fake emails are blocked. Your customers never see them. Scammers can't impersonate your business via email.

The Simple Version

If you just want to know what to do, here's the quick version:

Step 1: Check your current setup

Use the checker above to see if you already have DMARC. Many small businesses don't.

Step 2: Contact your email provider

If you use Google Workspace, Microsoft 365, or similar:

  • SPF is usually set up automatically
  • DKIM needs to be enabled (it's easy)
  • DMARC you add yourself

Ask your provider or IT person: "Do we have SPF, DKIM, and DMARC configured?"

Step 3: Add a DMARC record

The basic DMARC record for a small business:

v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com

This goes in your DNS as a TXT record at _dmarc.yourdomain.com. If that sounds complicated, your hosting provider or IT support can help.

Step 4: Monitor and strengthen

Start with p=none to make sure everything's working. After a few weeks, move to p=reject for full protection.

Common Small Business Email Setups

Google Workspace

If you use Google Workspace (Gmail for business):

  1. SPF: Usually configured when you set up the domain
  2. DKIM: Enable in Admin Console → Apps → Gmail → Authenticate email
  3. DMARC: Add the TXT record to your DNS

Full guide: Set up DMARC for Google Workspace

Microsoft 365

If you use Microsoft 365 (Outlook for business):

  1. SPF: Add Microsoft's include to your DNS
  2. DKIM: Enable in Microsoft 365 Defender portal
  3. DMARC: Add the TXT record to your DNS

Full guide: Set up DMARC for Microsoft 365

Other email providers

Most business email providers support DMARC. Check their documentation for:

  • SPF record to add
  • DKIM setup instructions
  • Any provider-specific requirements

What If You Use Multiple Email Services?

Many small businesses use more than one service:

  • Google Workspace or Microsoft 365 for regular email
  • Mailchimp or Constant Contact for newsletters
  • QuickBooks for invoices
  • A contact form that sends email

Each service needs to be included in your SPF record, and each should have DKIM configured. It sounds complicated, but each service has setup guides.

Make a list

Write down every service that sends email as your domain. Then configure each one. Common ones: email provider, newsletter tool, accounting software, website contact forms, CRM.

Getting Help

If this feels overwhelming, you have options:

Your IT support: If you have IT help (even part-time), they can handle this.

Your hosting provider: Many registrars and hosts offer DNS management help.

Email provider support: Google Workspace, Microsoft 365, and others have support teams.

A consultant: A one-time setup from an IT consultant typically costs a few hundred dollars and saves future headaches.

What DMARC Costs

The technology itself: Free. DMARC is an open standard.

Setup time: A few hours if you do it yourself, less if you get help.

Monitoring: Free checking with our tool. Paid monitoring ($39/month) for ongoing alerts across SPF, DKIM, DMARC, and MX.

Compare that to:

  • Lost business from emails in spam
  • Damage from a scammer using your domain
  • Time dealing with email issues

It's worth the small investment.

Signs You Need DMARC

If any of these apply, prioritize email authentication:

  • Customers say they didn't receive your emails
  • Your emails land in spam folders
  • You've heard about spoofed emails "from" your domain
  • You send bulk emails (newsletters, announcements)
  • You handle sensitive information (financial, legal, medical)
  • You want to look professional to enterprise clients

Getting Started Today

  1. Check your domain using the tool above
  2. Talk to your email provider about SPF and DKIM
  3. Add a DMARC record starting with p=none
  4. Monitor for a few weeks to ensure everything works
  5. Move to p=reject for full protection

Email authentication is increasingly expected. Getting it set up now protects your business and improves your email deliverability.

Monitor Your Business Email

The Email Deliverability Suite monitors your DMARC, SPF, DKIM, and MX records daily. Simple setup, no technical expertise needed.

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Simple email authentication monitoring. Get alerts if something breaks.

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