--- title: Setting Up DMARC to Protect Your Email Domain description: Prevent email spoofing and ensure deliverability by configuring DMARC for your domain—starting with monitoring and moving toward full protection. --- [Skip to content](https://help.datatalks.se/setting-up-dmarc-to-protect-your-email-domain#main-content) English Show submenu for translations [![Data-Talks-1](https://help.datatalks.se/hs-fs/hubfs/Data-Talks-1.png?width=200&height=100&name=Data-Talks-1.png)](https://datatalks.se/) Open main navigation Close main navigation - English Show submenu for translations - [Log in to the CDP](https://app.datatalks.se/) [Log in to the CDP](https://app.datatalks.se/) Hello! How can we help you? - There are no suggestions because the search field is empty. 1. [Data Talks CDP Help Center](https://help.datatalks.se/?hsLang=en) 2. [Getting Started with Data Talks](https://help.datatalks.se/getting-started-with-data-talks?hsLang=en) 3. [Email Sender Domain Settings](https://help.datatalks.se/getting-started-with-data-talks?hsLang=en#email-sender-domain-settings) # Setting Up DMARC to Protect Your Email Domain ## Prevent email spoofing and ensure deliverability by configuring DMARC for your domain—starting with monitoring and moving toward full protection. ### **What is DMARC and Why It Matters** **DMARC** (Domain-based Message Authentication, Reporting, and Conformance) is an email authentication protocol that protects your domain from email spoofing, phishing, and other fraudulent activities. It helps mail servers verify that messages claiming to come from your domain are actually authorized—and instructs them how to handle unauthorized attempts. DMARC builds on [SPF (Sender Policy Framework)](https://help.datatalks.se/setting-up-spf-to-authorize-your-email-senders?hsLang=en) and [DKIM (DomainKeys Identified Mail)](https://help.datatalks.se/setting-up-dkim-for-secure-email-sending?hsLang=en), creating a clear policy and reporting mechanism for domain owners. With DMARC in place, you gain: - Control over how unauthenticated messages from your domain are handled (quarantined or rejected) - Visibility into who is sending email on your behalf through aggregate and forensic reports - Stronger protection for your supporters, partners, and brand reputation --- ### **DMARC is a mandatory setting in the Data Talks CDP** Major providers like **Google** are tightening DMARC enforcement. If you're sending emails using a third-party service without proper authentication, your messages may soon be rejected or sent to spam. When you’re using Data Talks to send “as” your domain, ensure DMARC is configured. Contact your provider for guidance if unsure about the steps. --- ### **Step-by-Step: How to Implement DMARC** #### **1. Understand DMARC Policies** DMARC policies determine how receiving mail servers should handle unauthenticated emails: - **None** (`p=none`): Monitoring only. Emails are delivered normally, but reports are generated. - **Quarantine** (`p=quarantine`): Suspicious emails may be placed in recipients’ spam or quarantine folders. ***Recommended for active protection once monitoring is complete.*** - **Reject** (`p=reject`): Emails failing authentication are blocked. *Strongest enforcement—only use when you're confident your legitimate senders are aligned.* --- #### **2. Create and Publish a DMARC DNS Record** You’ll need to create a **TXT record** in your domain’s DNS settings under `_dmarc.yourdomain.com` Specify your preferred DMARC policy (none, quarantine, or reject). Include information about how to handle failed authentication, such as email reporting options. Example DMARC DNS record: ``` _dmarc.yourdomain.com. IN TXT "v=DMARC1; p=quarantine; rua=mailto:dmarc-reports@yourdomain.com; ruf=mailto:dmarc-forensic@yourdomain.com;" ``` `` #### Example Minimal DMARC DNS record: ``` _dmarc.yourdomain.com. IN TXT "v=DMARC1; p=none;" ``` **Key Tags:** - `v=DMARC1`: Protocol version - `p=`: Policy (`none`, `quarantine`, `reject`) - `rua=`: Aggregate reports - `ruf=`: Forensic (detailed) reports (optional) --- #### **3. Monitor and Adjust Gradually** Start with `p=none` to observe traffic and detect unauthorized use of your domain. Analyze the reports to understand: - Which systems are sending on your behalf - Whether SPF and DKIM are correctly configured Once confident, escalate to `quarantine` and eventually to `reject` for full protection. --- ### ✅ DMARC Secures Your Communications By implementing DMARC, you protect your brand, improve email deliverability, and reduce the risk of attackers impersonating your organization. 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