Customer.io supports using your own Mandrill account to send email with zero loss in functionality. To do this, there are two places you’ll need to change settings:
First, head to Custom SMTP Settings in the Email & Actions section:
Then add in your Mandrill settings (you can find those here):
When you save your settings, we’ll start sending emails through your Mandrill account.
If you’re using the Customer.io unsubscribe, then everything will continue to work. If you’d prefer to use the Mandrill-provided unsubscribe you’ll want to add their unsubscribe link to your emails or layouts. You’ll need to make one change to ensure it processes. Also, add class=”untracked” to the link, like this:
<a href="*|UNSUB:http://mywebsite.com/unsub|*" class="untracked">Unsubscribe.</a>
Please note that if you’re using the Mandrill unsubscribe, those unsubscribes will not be tracked in Customer.io. They’ll only be tracked in Mandrill.
Go to the Mandrill webhooks page and click “Add a Webhook”.
From there, check these events:
In the “Post To URL” field, enter:
Click Create Webhook to save.
If you’re using the drag-and-drop email editor or our own CSS pre-processing, Mandrill’s CSS inlining can interfere with our own, so we recommend disabling it. To do so, visit the Mandrill Sending Defaults page and make sure the Inline CSS Styles In HTML Emails option is disabled.
You can also disable Mandrill’s CSS inlining on a per-message basis by adding a custom X-MC-InlineCSS header to your email:
Your account is now set up to send email through Mandrill. If you have any questions or feedback about setting this up, just get in touch and we’ll be happy to help!