Mandrill DKIM Setup

DKIM (DomainKeys Identified Mail) is an authentication protocol that uses cryptographic signatures to ensure that email messages are not tampered with during transit and truly originate from your domain.

This guide outlines how to configure DKIM for Mandrill, Mailchimp’s transactional email service used for sending automated, personalized emails via API or SMTP.

Mandrill DKIM Requirements:

In order to enable authenticated sending on Mandrill, please follow this steps:

    1. In Mandrill, go to Settings and select Domains.
    2. (Optional) Then, to add a new domain, type the domain in the appropriate text box and click Add.
    3. Click View DKIM Settings. This will show you the two keys you will need to add to your DNS in the next step. The keys should resemble the following:
HostTypeValue
mte1._domainkey.CNAMEdkim1.mandrillapp.com
mte2._domainkey.CNAMEdkim2.mandrillapp.com
    1. Navigate to your DNS provider and add the above mentioned keys. If you’re using Sendmarc to manage your DKIM keys, you can easily add them using the process discussed here.
    2. Head back to the Mandrill Domains interface and click Test DNS Settings. If you’ve correctly added your keys, they should now validate.

How to update your DKIM settings using Sendmarc

To update your DKIM record through Sendmarc, please refer to the Sendmarc DKIM Setup Documentation.

Mandrill’s Documentation

Mandrill’s official DKIM configuration guide can be found here.

Looking for SPF Settings?

Find out how to configure your Mandrill SPF settings here.