Recipient Validation checks email addresses to ensure you are sending to valid recipients. It runs addresses through a series of checks that catch many common problems: Reason What it means Invalid Email Syntax Doesn't comply with email syntax standards. Disposable Domain The domain is from a known disposable domain service. Role Based Email Belongs to…

The Transmissions API is among our most heavily used endpoints. We know how critical it is to how our customers integrate email into their applications. That’s why we’re continuously looking for ways to further strengthen its reliability, maximize its performance, and improve the developer experience. It’s also why we’re very careful about making any changes…

In an effort to standardize our API responses to provide a more consistent API experience, all current error responses will be updated on January 12 2019 in the following manner: The description field will no longer be returned in error responses, in favor of the message field. The message field will include the information previously…

SparkPost's Bring Your Own IP program provides senders of large volumes of email with the ability to quickly switch from their existing provider or on-premises solution without having to worry about warming up new IPs, managing reputation, or communicating changes to their end customers. The BYOIP service provides IP portability for large volume senders focused…

# Event Definitions SparkPost logs several events that can be used to track the lifecycle of your emails. Individual events are available via Webhooks or the Message Events API. You can also view your recent events from the app(EU). The possible events are: Event Type Descriptions injection Email successfully generated or relayed to SparkPost. delivery…

# 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…