What causes email authentication failures when using Klaviyo DKIM and SPF, and how can I identify the root cause?

Email marketer from GlockApps explains that their tool can monitor your SPF, DKIM and DMARC records to ensure they are valid and to check your mail server configuration

Email marketer from Mailchimp explains that using your own domain helps build trust with customers by having your email appear with your brand, and also enables you to setup custom SPF, DKIM and DMARC records that can be properly configured and managed.

Email marketer from DMARC Analyzer explains that a mistake in your DNS configuration will cause problems authenticating your email and getting the email delivered. They recomend double and triple checking for missing fullstops at the end and other small common mistakes.

Email marketer from Mailjet shares that verifying your sending domain configuration within Klaviyo is crucial to ensure proper SPF and DKIM setup. This includes confirming that the necessary DNS records are correctly configured.

Marketer from Email Geeks explains that Perception Point, as a security gateway, might be modifying the message, inserting banners, or rewriting links, which could break authentication.

Email marketer from EmailOnAcid explains that poor IP address reputation can impact deliverability even with correct authentication. They recommend monitoring IP reputation and using dedicated IP addresses.

Email marketer from Litmus explains that a DMARC policy of 'none' will report on authentication failures, but will not reject or quarantine emails, which helps monitor for issues without affecting deliverability initially.

Email marketer from Mailhardener shares that common SPF misconfigurations, such as exceeding the 10 DNS lookup limit or syntax errors, can cause SPF failures. They recommend using tools to validate your SPF record.

Email marketer from Reddit explains that analyzing DMARC aggregate reports can help identify sources failing authentication. These reports highlight IP addresses sending emails on your behalf and whether they are passing SPF and DKIM checks.

Email marketer from Email Marketing Forum warns about hidden or forgotten email forwarding rules set up on mail servers that can break SPF. They suggest reviewing server configurations for any unexpected forwarding.

Expert from Spam Resource explains that SPF is susceptible to forwarding issues because the forwarder's server IP won't match the original sender's authorized IP in the SPF record. He recommends using SRS (Sender Rewriting Scheme) to address this.

Expert from Email Geeks suggests that if the 'mail from' and DKIM signature match your normal mail, it's almost guaranteed to be forwarding causing the issue.

Expert from Email Geeks explains that the listed IP addresses are unauthenticated sources of email. They could be compromised machines, email forwarding, or generic spam.

Expert from Word to the Wise explains it is critical to test and monitor DMARC records. This provides key insights into potential authentication failures, by monitoring mail streams it is easy to diagnose the root cause of a DKIM and SPF authentication problem.

Documentation from Google explains that SPF has limitations with forwarded email. When an email is forwarded, the original SPF record may no longer be valid, leading to authentication issues.

Documentation from SocketLabs explains that SPF failures occur when the sending server's IP address doesn't match the IPs authorized in the domain's SPF record. This can be due to incorrect SPF configuration or using a sending server not included in the SPF record.

Documentation from SparkPost shares that a DKIM selector mismatch occurs when the selector in the DKIM signature doesn't match the selector specified in the DNS record. They recommend checking Klaviyo's DKIM settings and DNS records.

Documentation from Klaviyo explains that DKIM failures in Klaviyo often stem from email forwarding. When an email is forwarded, the original DKIM signature becomes invalid, leading to authentication issues.