Authenticating Mailjet Emails with SPF and DKIM

Why are my Mailjet emails going to Spam?

If you have a problem with Mailjet 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 Mailjet emails being blocked is due to the Mailjet emails failing DMARC, which in the case of Mailjet, is usually due to a misconfiguration of SPF and DKIM.

How to stop Mailjet emails going to Junk.

The first step to preventing Mailjet 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 Mailjet emails from going to spam, or at least rule out authentication as the issue.

How to remove ‘via mailjet.com’ or ‘on behalf of mailjet.com’

Another example of where a Mailjet DKIM misconfiguration is to blame, is if your recipients report seeing the message as ‘via mailjet.com’ or ‘on behalf of mailjet.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 Mailjet by logging in to your Mailjet account to check to see if you have followed the following article to configure your Mailjet dkim setup to authenticate your domain.

How to stop Mailjet Failing DMARC

To ensure that your Mailjet campaigns pass DMARC and get delivered to your prospects, it is important to ensure that DKIM and SPF passes authentication for your domain. A common mistake is to sign an email with Mailjet’s own DKIM keys. However, in order for Mailjet’s email to pass authentication for your own domain, it is necessary to use your own DKIM keys as per Mailjet’s own guide. If you wish to verify the above, paste the message headers for a failed Mailjet message into our Mailjet email testing tool. Furthermore, you should also follow the instructions on how to set up SPF authentication for Mailjet.

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