A DMARC (Domain-based Message Authentication, Reporting & Conformance) record is a crucial component for securing your email domain. It prevents unauthorised use of your domain by ensuring that emails sent from your domain are authenticated using SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail). Our DMARC Record Generator makes it easy to create and configure your DMARC record, ensuring your domain's email security is robust and reliable.
- DMARC helps prevent unauthorised use of your domain, such as phishing attacks or email spoofing. By enforcing authentication checks through SPF and DKIM, DMARC ensures that only legitimate emails from your domain are delivered.
- With a properly configured DMARC record, legitimate emails are more likely to be delivered to recipients’ inboxes rather than being marked as spam. It signals to email receivers that your domain is protected and that their email handling practices should be stricter for your domain.
- DMARC enables you to receive reports about how your domain is being used in email communications. These reports provide insights into authentication failures and can help you understand and improve your email security posture.
By preventing unauthorised use of your domain, DMARC helps maintain your brand’s reputation. It assures recipients that emails from your domain are legitimate and trustworthy. Furthermore, implementing DMARC can help your organisation comply with industry standards and regulations related to email security and data protection.
Generating a DMARC record involves creating a DNS TXT record for your domain that specifies how email from your domain should be handled when it fails authentication checks. Here’s a step-by-step guide on how to generate a DMARC record:
1. Determine Your DMARC Policy
- none: Collects data without affecting email delivery. Good for initial setup and monitoring.
- quarantine: Marks failed emails as suspicious, which may send them to the spam or junk folder.
- reject: Completely blocks failed emails from being delivered.
2. Choose Optional Tags
- rua: Email address for receiving aggregate reports (e.g., mailto:reports@example.com).
- ruf: Email address for receiving forensic reports (e.g., mailto:failures@example.com).
- sp: Policy for subdomains, if different from the main domain.
- adkim: DKIM alignment mode (r for relaxed or s for strict).
- aspf: SPF alignment mode (r for relaxed or s for strict).
- fo: Forensic reporting options (0, 1, d, or s).
- rf: Reporting format (afrf for aggregate feedback or iodef for incident report).
- pct: Percentage of emails to apply the policy to (e.g., pct=70).
- ri: Reporting interval in seconds (default is 86400 for daily reports).
3. Construct Your DMARC Record
Combine the tags and values into a single string format. For example: v=DMARC1; p=reject; rua=mailto:reports@example.com; ruf=mailto:failures@example.com; sp=quarantine; adkim=s; aspf=s; fo=1; rf=afrf; pct=100; ri=86400
4. Add the DMARC Record to Your DNS
- Log in to the DNS management console of your domain registrar or DNS hosting provider.
- Create a New TXT Record:
Host/Name: Enter _dmarc as the host or name (for example, _dmarc.yourdomain.com).
Value: Paste the DMARC record string you constructed.
TTL: Set the TTL (Time To Live) value. Default is usually fine.
- Save the Record: Apply or save the changes.
5. Verify Your DMARC Record
After adding the record, use Smartlead DMARC checking tool to verify that your record is correctly configured and propagated.
6. Monitor and Adjust
- Regularly check the aggregate and forensic reports to monitor how emails from your domain are handled.
- Based on the reports, adjust your DMARC policy if necessary to improve email security and deliverability.
Easily create a DMARC record for your domain or subdomain. Submit your domain, and we'll verify if a DMARC record exists. DMARC record generator is helpful if your DMARC checker results show that you’re missing the record or it contains any errors. Here are the tags and their descriptions:
v (required): The version tag. The only allowed value is "DMARC1". If it's incorrect or the tag is missing, the DMARC record will be ignored.
p (required): The DMARC policy. Allowed values are "none", "quarantine", or "reject". The default is "none," which takes no action against non-authenticated emails. It only helps collect DMARC reports and gain insight into your current email flows and their authentication status. "quarantine" marks the failed emails as suspicious, while "reject" blocks them.
rua: Aggregate report sending destination. It's the "mailto:" URI that ESPs use to send failure reports. The tag is optional, but you won’t receive reports if you skip it.
ruf: Forensic (Failure) report sending destination. It's the "mailto:" URI that ESPs use to send failure reports. The tag is optional, but you won’t receive reports if you skip it.
sp: The subdomain policy. The subdomain inherits the domain policy tag (p=) explained above unless specifically defined here. Like the domain policy, the allowed values are "none," "quarantine," or "reject." This option isn't widely used nowadays.
adkim: The DKIM signature alignment. This tag follows the alignment between the DKIM domain and the parent Header From domain. Allowed values are "r" (relaxed) or "s" (strict). "r" is the default and allows a partial match, while the "s" tag requires the domains to be the same.
aspf: The SPF alignment. This tag follows the alignment between the SPF domain (the sender) and the Header From domain. Allowed values are "r" (relaxed) or "s" (strict). "r" is the default, and allows a partial match, while the "s" tag requires the domains to be exactly the same.
fo: Forensic reporting options. Allowed values are "0," "1," "d," and "s." "0" is the default value, which generates a forensic report when both SPF and DKIM fail to produce an aligned pass. If either of the protocol outcomes is something other than pass, use "1." "d" generates a report when DKIM is invalid, while "s" does the same for SPF. Define the ruf tag to receive forensic reports.
rf: The reporting format for failure reports. Allowed values are "afrf" and "iodef".
pct: The percentage tag. This tag works on domains with "quarantine" or "reject" policy only. It marks the percentage of failed emails a given policy should be applied to. The rest falls under a lower policy. For example, if "pct=70," on a domain with "quarantine" policy, it applies only 70% of the time. The remaining 30% goes under "p=none". Similarly, if "p=reject" and "pct=70," "reject" applies to the 70% of failed emails, and the 30% go into "quarantine."
ri: Reporting interval. Marks the frequency of received XML reports in seconds. The default is 86400 (once a day). Regardless of the set interval, in most cases, ISPs send the reports at different intervals (usually once a day).
To implement a DMARC record in your DNS:
1. Log In: Access your DNS management console through your domain registrar or DNS provider.
2. Create TXT Record:
- Host/Name: Enter _dmarc (e.g., _dmarc.example.com).
- Value/Data: Input your DMARC policy string, such as v=DMARC1; p=quarantine; rua=mailto:reports@example.com; ruf=mailto:failures@example.com; adkim=r; aspf=r; pct=100; ri=86400.-
- TTL: Set the TTL value, typically 3600 seconds (1 hour) or 86400 seconds (24 hours).
3. Save: Apply the changes to add the DMARC record.
4. Verify: Use a DMARC checker tool to confirm the record is correctly configured and propagated.
5. Monitor: Regularly review the reports sent to the addresses specified to adjust and optimise your DMARC policy as needed.This setup helps protect your domain from email abuse and improves email deliverability.
A DMARC record helps protect your domain from being used in email spoofing and phishing attacks. It provides you with reports on email activities, allowing you to monitor and improve your email authentication practices.
Simply submit your domain or subdomain in the tool.
Our DMARC Record Generator will guide you through a quick and advanced setup to create your DMARC record.
Fill in the required fields, click "Generate DMARC," and your record will be ready.
The essential tags for a DMARC record are:
v: Version tag, which must be "DMARC1".
p: DMARC policy, which can be "none," "quarantine," or "reject".
Yes, by including the `rua` and `ruf` tags in your DMARC record, you can receive aggregate and forensic reports on email activities. These reports help you understand your email flows and authentication status.
The `p` tag specifies the DMARC policy for your domain.
The values can be:
none: Takes no action against non-authenticated emails.
quarantine: Marks failed emails as suspicious.
reject: Blocks failed emails from being delivered.
You can use the `pct` tag to specify the percentage of failed emails that the DMARC policy should apply to. For example, `pct=70` means the policy applies to 70% of failed emails.
The `ri` tag determines the reporting interval in seconds. The default is 86400 seconds (once a day). However, the actual frequency may vary depending on the ISPs.
If your DMARC record has errors or is missing required tags, it will be ignored. Ensure that the `v` tag is set to "DMARC1" and that the `p` tag is properly configured.
Yes, you can use the `sp` tag to set specific DMARC policies for subdomains. If the `sp` tag is not set, subdomains will inherit the main domain policy. Feel free to reach out to our customer support team for any query or concern.
DMARC domain alignment ensures that the domain used in SPF and DKIM matches or aligns with the domain in the email’s From header. It can be strict or relaxed based on adkim (DKIM alignment) and aspf (SPF alignment) settings. When you generate DMARC record, these settings help ensure that only authorized emails are processed, enhancing email security.
DMARC policies apply to subdomains based on the sp (subdomain policy) tag. By default, subdomains inherit the main domain’s DMARC policy. To customize this, use a DMARC policy generator to specify different rules for subdomains if needed. When you build DMARC record, ensuring proper subdomain policy settings helps manage email security across all related domains.
No, you cannot effectively implement DMARC without SPF or DKIM. DMARC relies on these authentication methods to function. If you want to create a DMARC record, ensure SPF and DKIM are set up first. Use a DMARC record creator or DMARC generator tool to integrate these elements properly for complete email protection.
DMARC record checks can fail due to syntax errors, incorrect policies, or misconfigured SPF/DKIM settings. Ensure your DMARC record is correctly formatted and aligns with your SPF and DKIM settings. Utilize a DMARC TXT record generator to verify and correct any issues. Properly configuring your DMARC setup using a DMARC policy generator will help resolve these failures.
Yes, if misconfigured, DMARC can affect legitimate email delivery by inadvertently marking valid emails as suspicious or rejecting them. To avoid this, carefully generate DMARC record settings and test configurations. Utilise a DMARC TXT record generator to create a record that balances security with deliverability, and regularly review reports to fine-tune your settings. Proper setup with a DMARC policy generator helps minimize disruption to legitimate emails.
DMARC itself cannot be spoofed if properly implemented, as it relies on SPF and DKIM for authentication. However, misconfigurations or weak policies can lead to gaps in protection. To prevent this, use a DMARC generator tool or DMARC record creator to accurately build DMARC records and enforce strong policies. Regular monitoring and adjustments ensure continued email security.