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What is a DMARC policy and how does it affect the sending of my emails?

Ankita

Last Update vor 5 Monaten

DMARC (Domain-based Message Authentication, Reporting, and Conformance) is a security standard that helps protect your email domain from being misused. It ensures that only authorized people or systems can send emails on your behalf, making your email communications more secure and trustworthy.

Think of it like a digital bouncer for your email domain, checking every message to ensure it’s from someone allowed to use your name.

How DMARC Works

DMARC works alongside two other email authentication methods:

  1. SPF (Sender Policy Framework): Confirms whether the email came from an approved sender.
  2. DKIM (DomainKeys Identified Mail): Adds a digital signature to emails, proving they haven’t been tampered with.

.Once SPF and DKIM checks are done, DMARC decides what to do with emails that fail these checks.

Why is DMARC Important?

Without DMARC, cybercriminals can easily pretend to be you, sending fake emails that harm your reputation and mislead your recipients. DMARC acts as your shield, helping you:

  1. Prevent Email Spoofing: Stops attackers from impersonating your email address.
  2. Protect Your Brand: Keeps your name trustworthy in the eyes of your customers.
  3. Improve Deliverability: Increases the chances of your emails landing in the inbox instead of spam.

How DMARC Affects Your Emails

When you set up a DMARC policy, you decide how to handle emails that fail authentication:

  1. Monitor (p=none): No action is taken; you just get reports about who’s sending emails from your domain.
  2. Quarantine (p=quarantine): Suspicious emails are flagged as spam.
  3. Reject (p=reject): Blocks unauthorized emails completely.

Why You Need DMARC for Email Marketing

If you’re using an email marketing tool like Seamailer, DMARC ensures that your emails are properly authenticated and not flagged as suspicious. Without it, your campaigns may end up in spam or be rejected.


Steps to Implement DMARC

  1. Set Up SPF and DKIM: Add these records to your domain’s DNS settings.
  2. Publish a DMARC Record: Start with a monitoring policy (p=none) to track email activity.
  3. Analyze Reports: Use the data to spot unauthorized use of your domain.
  4. Enforce Strict Policies: Gradually move to quarantine or reject to block fake emails.


Considerations for Seamailer

  • Ensure that your domain’s SPF and DKIM records are set up correctly in your DNS.
  • Publish a DMARC record with a monitoring policy (p=none) first to gather insights before enforcing stricter policies.
  • Work with Seamailer’s support team to confirm proper email authentication alignment, ensuring emails sent via Seamailer comply with your DMARC policy.


By using DMARC, you protect your domain, boost your email marketing success, and give your recipients peace of mind knowing your emails are genuine.

Want help setting it up? Let’s get started!

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