Why is my DMARC success rate dropping?

Email marketer from EmailSecuritySPF forum responds that DMARC failures are often linked to improperly configured SPF records (especially exceeding the 10 DNS lookup limit) or broken DKIM signatures due to modifications during transit. Using a DMARC monitoring tool is recommended.

Email marketer from EasyDMARC explains that common reasons for DMARC failure are changes in email sending practices, problems with SPF records, issues with DKIM signatures, and unauthorized email sending from your domain.

Email marketer from Postmark Blog shares that a frequent cause is changes to email infrastructure, such as new servers or services, which aren't correctly configured with SPF and DKIM. Also, make sure the 'From' domain matches the domain used for SPF and DKIM.

Email marketer from StackOverflow states that a common cause is third-party email services sending on your behalf without proper SPF/DKIM setup. This requires granting them permission and correctly configuring SPF and DKIM for those services.

Marketer from Email Geeks warns that even with a p=none policy, some regional providers might treat it as p=reject, so receiver behavior should not be assumed.

Email marketer from Mailhardener Blog explains that DMARC failures can arise from issues such as incorrect SPF records, DKIM signatures failing due to key rotation problems or tampering, and forwading misconfigurations which break SPF.

Email marketer from ReturnPath shares that you should keep an eye on your domain's DMARC reports to track unauthorized use, which could lead to lower success rates. It will help you know where to make adjustments.

Marketer from Email Geeks suggests checking DMARC reports to understand why providers are failing DMARC. The most common reason is a change in SPF or DKIM configurations.

Marketer from Email Geeks suggests the 'from' address might have changed, causing SPF and DKIM to be okay but not aligned, leading to DMARC failures.

Email marketer from Reddit shares that common issues include SPF record limits, DKIM key rotation problems, and email forwarding. Suggests checking DMARC reports to diagnose the root cause.

Email marketer from MXToolbox Blog advises that maintaining accurate SPF records and ensuring DKIM signatures are valid is essential. Regularly reviewing DMARC reports to catch any discrepancies is a best practice.

Expert from Word to the Wise explains that DMARC issues often arise when emails are forwarded, as forwarding can break SPF. He suggests that if a significant portion of your email stream is forwarded, DMARC might cause deliverability problems. He also suggests to not use DMARC if you are a forwarder.

Expert from Word to the Wise responds that if your DMARC policy is set to quarantine or reject, then failing DMARC can directly impact your deliverability. He recommends starting with a 'p=none' policy to monitor the impact before enforcing stricter policies.

Expert from Email Geeks says that DMARC reports will specify exactly which emails failed and why. You will get an email for every message that fails DMARC. Those reports contain enough information for you to identify exactly which emails failed and why.

Expert from Word to the Wise suggests parsing and understanding aggregate DMARC reports is essential for diagnosing DMARC failures. She emphasizes that these reports provide the necessary data to identify and resolve issues affecting DMARC compliance.

Documentation from RFC7489 defines DMARC and explains that policy application depends on SPF and DKIM authentication results. Failures can occur when SPF or DKIM checks fail, or when the 'From:' domain does not align with the SPF or DKIM domains.

Documentation from Microsoft explains that DMARC failures can happen when emails are sent from IPs not included in the SPF record, or when DKIM signatures don't match the domain. Monitoring DMARC reports helps identify these issues.

Documentation from Google Workspace Admin Help explains that DMARC failures can stem from issues with SPF and DKIM, such as SPF not authenticating due to forwarding, or DKIM signatures being invalid. Suggests carefully examining aggregate DMARC reports to identify failing sources.

Documentation from DMARC.org explains that DMARC can fail if SPF fails to authenticate the sending server (e.g., due to forwarding or misconfigured SPF records), or if DKIM signatures are invalid or absent. Also explains that alignment is crucial; even if SPF or DKIM pass, they must align with the From: domain.