# Introduction DKIM signing by IP pool allows service providers to brand (or white label) the DKIM signature of the messages they send on behalf of their customers/senders. It gives the ability for service providers to use their own DKIM signing domain for groups of senders where having an individual DKIM signature for each from…

As part of our efforts to deprecate TLSv1.0 fallback across our systems, we have made available hostnames which can be used to test the connections and processes which leverage our REST API and SMTP services. The hostname is configured to reject TLSv1.0 connections, and therefore can be used to verify your processes are using TLSv1.1…

# Introduction Both Universal and App links are a mechanism in iOS (9 and later) and Android (6.0 and later) that allows you to link deeply into your apps from web pages and HTML email. To use deep linking, you must publish the URLs you'd like your app to handle and then add support for…

SparkPost and SparkPost Enterprise provide data streams of raw event data via webhooks. There are several points of consideration to take into account in order to ensure you correctly receive the event data. This article details how our webhooks function so you can successfully set up your endpoint to consume streamed event data. # Webhook…

This article describes how to tell if you are affected by the upcoming transmissions API endpoint change for asynchronous suppressions described here and also how to prepare. # What Is Changing? The change announcement here has all the details including timing. Here is a short recap. The Transmissions API endpoint will no longer return 400…

# What is a Relay Webhook? A Relay Webhook calls your consumer when a user sends an email to one of your domains. SparkPost will receive an email sent to your Inbound Domain (e.g., [email protected]), format that email as a JSON payload, and POST it to your consumer. A Relay Webhook is not a mailbox;…

# Introduction The open pixel is a 1x1 transparent gif that we insert into messages to track which recipients open messages (aka renders). When an end recipient has images turned on in their client, the pixel is downloaded from our server, which allows us to record which recipient opened which message. Certain ISPs, like Gmail,…

This article "Enabling HTTPS Engagement" describes how to use a Content Delivery Network (CDN) to enable SSL engagement tracking for your domain.

The Enterprise Change log is a running list of new features and capabilities that have been rolled out on the SparkPost Enterprise service.