If you send mail through SMTP rather than REST, you may encounter some SMTP error messages. Here's what to do when you receive them.

If you're sending via SMTP you may wonder why configure DKIM? Learn why configuring DKIm is the best way to protect your sending reputation.

Our sink server allows you to perform sink test messages for integration testing without attempting delivery of email to actual addresses.

SparkPost user management capabilities includes the ability to add or delete an additional user(s) to your account. This self-service feature is available via the user interface in the Account > Users section of the UI.  Moreover, there are also two role-based features available in the Web UI and they are: Admin and Reporting. Admin Role: Has…

Understanding delays and bounces. If the final disposition for messages sent from SparkPost is delivered or bounced, what are delays? Learn more here.

Time series graphs on the summary page calculate most rate metrics against the number of targeted messages. Display the results for specific times and more.

It can take a minute for suppression events like spam complaints, unsubscribe requests, and hard bounces to be collected and processed. Learn more here.

SparkPost doesn't store images for you. If you are not using a front end application where you can store your images, here are some recommendations.

If you are SMTP connection problems with SparkPost, here's a checklist of things to verify and process to follow to ensure proper functionality.