Configuring WP Engine DMARC: A Step-by-Step Guide to Securing Your WordPress Site's Email

14 October 2026 · DMARC Engine · 13 min read

WP Engine DMARC Configuration: A Pressing Concern for WordPress Site Owners

Configuring DMARC on WP Engine requires careful consideration of the trade-offs between security and deliverability. A key concern is the alignment of SPF and DKIM records, which can be tricky to organise, particularly in a hosted environment like WP Engine. For instance, if you have a third-party email service like Mailchimp, you will need to ensure that their servers are included in your SPF record to avoid false positives.

v=spf1 include:_spf.mailchimp.com ~all

In a managed setup like WP Engine, the centre of attention should be on optimising the DMARC policy to balance protection against phishing attacks and legitimate email deliverability. A common mistake is to set the policy to p=reject without thoroughly testing the configuration, which can result in legitimate emails being rejected.

v=DMARC1; p=none; pct=100; rua=mailto:aggregate@example.com

It is essential to monitor the aggregate reports to identify any issues and adjust the policy accordingly. The colour of the reports can vary, but a good starting point is to set the policy to p=none and monitor the reports before moving to a more restrictive policy like p=quarantine or p=reject. By taking a structured approach to configuring DMARC on WP Engine, WordPress site owners can optimise their email security and deliverability, which is crucial in today's online landscape, where a single misstep can have serious consequences.

Understanding WP Engine's DMARC Requirements and Limitations

When configuring DMARC on WP Engine, it is crucial to centre your strategy around the platform's specific requirements and limitations. A key consideration is the handling of subdomains, as WP Engine uses a unique subdomain for each site, such as username.wpengine.com. This subdomain must be included in your DMARC configuration to ensure proper email authentication.

For instance, if your website is example.com and you are using WP Engine, your DMARC record might look like this:

_dmarc.example.com. IN TXT "v=DMARC1; p=none; pct=100; rua=mailto:aggregate@example.com; ruf=mailto:forensic@example.com; fo=1"

However, you must also configure DMARC for the WP Engine subdomain, which would be username.wpengine.com. This requires an additional DMARC record:

_dmarc.username.wpengine.com. IN TXT "v=DMARC1; p=none; pct=100; rua=mailto:aggregate@example.com; ruf=mailto:forensic@example.com; fo=1"

In a hosted setup like WP Engine, the colour of the DMARC configuration can be slightly different due to the shared environment. WP Engine's system may automatically generate certain DNS records, such as SPF, which can affect your DMARC configuration. It is essential to optimise your DMARC settings in conjunction with these automatically generated records to avoid conflicts.

A common trade-off in DMARC configuration on WP Engine is the choice between using a relaxed policy, such as p=none, and a more stringent policy, like p=quarantine or p=reject. While a stricter policy provides better protection against spam and phishing, it may also lead to false positives, where legitimate emails are incorrectly flagged or blocked.

To mitigate this risk, it is recommended to start with a relaxed policy and gradually move to a more stringent one, closely monitoring the aggregate reports to identify and address any issues before they become critical. By doing so, you can effectively optimise your DMARC settings to secure your WordPress site's email without disrupting legitimate communication.

In the context of WP Engine, the organisation of your DMARC configuration must also take into account the platform's built-in security features and how they interact with your custom DMARC settings. This includes understanding how WP Engine handles email routing and authentication, which can impact the effectiveness of your DMARC policy.

Ultimately, the goal is to achieve a balanced DMARC configuration that maximises email security without compromising deliverability, a challenge that requires careful consideration of WP Engine's specific requirements and limitations.

Step-by-Step Guide to Setting Up DMARC on WP Engine

To set up DMARC on WP Engine, you will need to create a DMARC record and configure it to work with your WordPress site. The first step is to determine the policy you want to enforce, which can be one of three options: none, quarantine, or reject. For example, a policy of p=none will monitor email senders and provide reports, but will not block or quarantine emails.

A more restrictive policy, such as p=quarantine, will flag emails from unauthenticated senders, but may still deliver them to the recipient's spam folder.

The most restrictive policy, p=reject, will block all emails from unauthenticated senders, which can help prevent spam and phishing attacks, but may also block legitimate emails if not configured correctly.

To create a DMARC record, you will need to add a TXT record to your domain's DNS settings. The record should include the following elements: v=DMARC1, which specifies the DMARC version, p for the policy, sp for the subdomain policy, pct for the percentage of emails to which the policy applies, and rua and ruf for the aggregate and forensic report URIs.

Here is an example of what the record might look like:

v=DMARC1; p=none; sp=none; pct=100; rua=mailto:example@example.com; ruf=mailto:example@example.com; fo=1

In this example, the policy is set to none, which means that emails from unauthenticated senders will be monitored, but not blocked or quarantined. The sp element is also set to none, which means that the same policy applies to subdomains.

The pct element is set to 100, which means that the policy applies to all emails. The rua and ruf elements specify the email addresses to which aggregate and forensic reports will be sent.

When configuring DMARC on WP Engine, it is essential to consider the trade-offs between security and deliverability. A more restrictive policy, such as p=reject, can help prevent spam and phishing attacks, but may also block legitimate emails if not configured correctly.

On the other hand, a less restrictive policy, such as p=none, may allow more spam and phishing emails to be delivered, but can also provide more flexibility and reduce the risk of blocking legitimate emails.

WP Engine's managed setup handles some aspects of DMARC configuration, such as providing a default DMARC record and automatically updating the record when changes are made to the site's DNS settings. However, it is still essential to monitor and adjust the DMARC record as needed to ensure optimal performance and security.

To configure DMARC on WP Engine, follow these steps:

1. Log in to your WP Engine User Portal and navigate to the DNS settings for your site.
2. Click on the "Add a record" button and select "TXT" as the record type.
3. Enter the DMARC record, including the v, p, sp, pct, rua, and ruf elements, as shown in the example above.
4. Click "Save" to save the record.
5. Verify that the record is correct and functioning as expected by checking the DNS settings and monitoring email senders.

It is also essential to configure SPF and DKIM records to work with DMARC, as these records provide additional authentication and can help improve email deliverability.

SPF records specify which IP addresses are authorised to send emails on behalf of your domain, while DKIM records provide a digital signature that verifies the authenticity of emails.

By configuring SPF and DKIM records, you can help prevent spam and phishing attacks and improve the overall security and deliverability of your emails.

In addition to configuring DMARC, SPF, and DKIM records, it is also essential to monitor and interpret aggregate reports to optimise DMARC performance.

These reports provide valuable insights into email senders and can help you identify and block spam and phishing attacks.

By monitoring and adjusting the DMARC record as needed, you can help ensure optimal performance and security for your WordPress site's email.

Configuring SPF and DKIM Records for Optimal DMARC Performance

To achieve optimal DMARC performance, it is crucial to configure SPF and DKIM records correctly, as these protocols work in tandem with DMARC to prevent email spoofing and ensure the authenticity of emails sent from your domain. In a hosted setup like WP Engine, the process is somewhat simplified, but there are still specific considerations to keep in mind.

When configuring SPF records, the goal is to define which mail servers are authorised to send emails on behalf of your domain. A typical SPF record might look like this:

v=spf1 a mx ip4:192.0.2.1 include:_spf.example.com -all

This record specifies that the mail servers a and mx are authorised, as well as the IP address 192.0.2.1 and any mail servers listed in the _spf.example.com record. The -all directive at the end indicates that any mail server not explicitly listed should be rejected.

In the context of WP Engine, you will need to include their mail servers in your SPF record. WP Engine provides specific guidance on how to do this, but essentially you will need to add an include directive for their SPF record, which might look something like this:

v=spf1 include:wpengine.com -all

It is also important to note that WP Engine uses a variety of IP addresses to send email, so you may need to use a wildcard ip4 directive to cover all of their mail servers.

DKIM records, on the other hand, are used to verify the authenticity of emails by encrypting a digital signature that can be verified by the recipient's mail server. To configure DKIM, you will need to generate a public/private key pair and add a DKIM record to your domain's DNS. The DKIM record will typically look something like this:

k1._domainkey.example.com. IN TXT "k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC4fb5N4aH7LwL7r4uLw2ggm7N5K2Z5+3a3pD3JjH5Og7n5aH5oD3G4eD4aH5iD3I4eD4aH5jD3K4eD4aH5kD3L4eD4aH5mD3N4eD4aH5nQIDAQAB"

In a managed setup like WP Engine, the DKIM key pair is often generated and managed for you, which simplifies the process of configuring DKIM. However, you will still need to add the DKIM record to your domain's DNS, which may require some technical expertise.

One common pitfall to watch out for when configuring SPF and DKIM records is the use of too many include directives in your SPF record. Each include directive can add latency to the email delivery process, so it is best to keep the number of include directives to a minimum. Also, it is crucial to test your SPF and DKIM records regularly to ensure they are configured correctly and functioning as expected.

In terms of optimising DMARC performance, it is generally recommended to start with a relaxed policy, such as p=none, and gradually increase the strictness of the policy as you become more confident in the accuracy of your SPF and DKIM records. This approach allows you to monitor the impact of DMARC on your email delivery and make adjustments as needed.

Ultimately, configuring SPF and DKIM records for optimal DMARC performance requires careful attention to detail and a thorough understanding of how these protocols interact with each other. By following best practices and taking a methodical approach to configuration and testing, you can help ensure the authenticity and deliverability of emails sent from your domain.

Interpreting Aggregate Reports: A Key to Optimising DMARC

Interpreting aggregate reports is a crucial step in optimising DMARC for your WordPress site, as it provides valuable insights into email authentication issues and potential security threats. When configuring DMARC on WP Engine, it is essential to understand how to read and act on these reports. A typical aggregate report will contain information on the source IP address, message headers, and authentication results, as shown in the following example:

{
 "report_metadata": {
 "org_name": "example.com",
 "email": "dmarc@example.com",
 "extra_contact_info": "https://example.com/dmarc",
 "report_id": "1234567890",
 "date_range": {
 "begin": "2022-01-01T00:00:00Z",
 "end": "2022-01-01T23:59:59Z"
 }
 },
 "policy_published": {
 "domain": "example.com",
 "adkim": "r",
 "aspf": "r",
 "p": "none",
 "sp": "none",
 "pct": 100
 },
 "record": [
 {
 "row": {
 "source_ip": "192.0.2.1",
 "count": 10,
 "policy_evaluated": {
 "disposition": "none",
 "dkim": "pass",
 "spf": "pass"
 }
 }
 },
 {
 "row": {
 "source_ip": "198.51.100.1",
 "count": 5,
 "policy_evaluated": {
 "disposition": "none",
 "dkim": "fail",
 "spf": "fail"
 }
 }
 }
 ]
}

In a hosted or managed setup like DMARC Engine, these reports are typically collected and analysed automatically, providing a centralised view of email authentication issues across all domains. When reviewing these reports, it is essential to focus on the policy_evaluated section, which indicates the authentication results for each message. A disposition of none indicates that the message passed DMARC authentication, while a fail result suggests that the message failed authentication and may be a potential security threat. By analysing these reports, you can identify potential issues with your SPF and DKIM records, such as incorrect IP addresses or invalid signatures, and take corrective action to optimise your DMARC configuration. For example, if you notice a high volume of messages failing DMARC authentication from a specific source IP address, you may need to update your SPF record to include that IP address. Similarly, if you see a large number of messages failing DKIM authentication, you may need to review your DKIM signing configuration to ensure that it is correctly configured. By regularly reviewing and acting on aggregate reports, you can ensure that your DMARC configuration is optimised and effective in preventing email spoofing and phishing attacks.

Common Pitfalls and Troubleshooting Tips for WP Engine DMARC

When configuring DMARC on WP Engine, a common pitfall is misconfiguring the SPF record, which can lead to email delivery issues. For instance, if you have multiple mail servers, it is crucial to include all of them in the SPF record to avoid false positives. A typical SPF record might look like this:

v=spf1 include:_spf.wpengine.com ip4:192.0.2.1 -all

In a hosted setup like WP Engine, it is essential to utilise their recommended SPF record format to ensure seamless integration with their mail servers.

Another issue that may arise is DKIM key mismanagement. When rotating DKIM keys, it is vital to update the corresponding DNS records promptly to prevent email authentication failures. The DKIM record should resemble this:

k1._domainkey.example.com. 300 IN TXT "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkRyOdnzxCKQHwO7H7JiDl1h5n//..."

In our experience, the centre of most DMARC issues is the alignment of the domain in the From header with the domain in the SPF or DKIM record. To optimise DMARC performance, we recommend regularly monitoring aggregate reports to identify potential issues before they affect email deliverability. By doing so, you can colour your DMARC configuration with a more nuanced understanding of your email ecosystem, ultimately helping to organise your email security strategy.

Best Practices for Maintaining and Updating DMARC Settings on WP Engine

To centre your email security efforts, organise regular reviews of your DMARC settings on WP Engine. As your organisation's email ecosystem evolves, it is crucial to update your DMARC records to reflect changes in mail flow, such as new email service providers or subdomains. For instance, when adding a new marketing automation tool, ensure its IP addresses are included in your SPF record, like so:

v=spf1 include:_spf.example.com ip4:192.0.2.1 -all

A hosted setup like WP Engine can simplify this process by handling the underlying DNS updates, but it is still your responsibility to optimise the records themselves. To colour outside the lines of basic security, consider implementing a feedback loop to monitor aggregate reports and adjust your DMARC policy accordingly, aiming for a reject policy to maximise protection against spoofing. By doing so, you can ensure your WordPress site's email is secure and trustworthy.

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