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How to stop Marketo emails going to junk

Last modified on Wednesday, May 8, 2024

2 minute read

marketo.com-emails-going-to-spam

Authenticating Marketo Emails with DKIM

Why are my Marketo emails going to Spam?

If you have a problem with Marketo emails going to spam, that is, going to the junk folder of your recipients, then it is very likely an issue with your email authentication. Emails failing authentication, be they failing SPF, failing DKIM, or failing DMARC is common, as SPF, DKIM, and DMARC are often not properly implemented by domain administrators. Often, the main cause of Marketo emails being blocked is due to the Marketo emails failing DMARC, which in the case of Marketo, is usually due to a misconfiguration of DKIM.

How to stop Marketo emails going to Junk.

The first step to preventing Marketo email going to spam is to retrieve a failed message and access its header information. This will allow you to quickly diagnose whether any authentication issues such as DKIM or DMARC are flagging your email as spam, instructing the recipient sender to move it to junk. Simply paste the email headers into our free Stellastra Deliverability Tool, which you can use freely with no log in required. Our deliverability tool should allow you to avoid Marketo emails from going to spam, or at least rule out authentication as the issue.

How to remove 'via marketo.com' or 'on behalf of marketo.com'

Another example of where a Marketo DKIM misconfiguration is to blame, is if your recipients report seeing the message as 'via marketo.com' or 'on behalf of marketo.com' and that the emails typically end up in spam or junk. The Stellastra Email Deliverability tool above will confirm this prognosis, however, you may also wish to configure DKIM for Marketo by logging in to your Marketo account to check to see if you have followed the following article to configure your Marketo dkim setup to authenticate your domain.

How to stop Marketo Failing DMARC

To ensure that your Marketo campaigns pass DMARC and get delivered to your prospects, it is important to ensure that DKIM passes authentication for your domain. A common mistake is to sign an email with Marketo DKIM keys. However, in order for Marketo email to pass authentication for your own domain, it is necessary to use your own DKIM keys as per Marketo's own guide. If you wish to verify the above, paste the message headers for a failed Marketo message into our Marketo email testing tool

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