Use your Sparkpost Account to Send Customer.io Email

Customer.io supports using your own Sparkpost account to send email with zero loss in functionality. To do this there are two places you’ll need to change settings:

1. On Sparkpost

First, you need to point Sparkpost’s webhooks at Customer.io and get your SMTP information.

Point Sparkpost’s webhooks at Customer.io

Add the following webhook URL on the Sparkpost webhooks page for every domain you’ll be sending via Customer.io:

https://track.customer.io/sparkpost/events

Example webhook config

WARNING!

The Clicks and Opens webhooks should not be sent back to Customer.io as we’re already tracking this information on our side and each event will be recorded twice (via Customer.io and via Sparkpost).

If you want to track opens and clicks via Sparkpost only, you can change the sending behavior on an email by email basis.

Create a new SMTP delivery key

From the Sparkpost API keys page, you will need to create a new key for use in sending via Customer.io

Sparkpost create API key

Save or copy the generated key as you will need it for configuring your SMTP in Customer.io, and can only access it once!

Sparkpost API key created

2. In Customer.io

Configure custom SMTP settings

First, head to Custom SMTP Settings in the Email & Actions section:

Sparkpost SMTP settings

Then add in your Sparkpost SMTP credentials:

Sparkpost SMTP settings

When you save your settings, we’ll start sending emails through your Sparkpost account.

Success!

Your account is now set up to send email through Sparkpost. If you have any questions or feedback about setting this up, just get in touch and we’ll be happy to help!