API-based validation
Sep. 4, 2019 By Steve Tuck

Recipient Validation: API-based Validation

Senior Messaging Engineer, Steve Tuck, explains how to use his simple command-line tool to validate email addresses with SparkPost's API-based validation.

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spam traps
Aug. 16, 2019 By Avi Goldman

Spam Traps: Break it Down

Find and fix issues faster with our breakdown of spam traps now available as part of our Spam Trap Monitoring feature inside of SparkPost Signals.

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Dec. 5, 2018 By Haley Solomon

Introducing Our New Recipient Validation Feature

SparkPost’s new feature, Recipient Validation, is an easy, efficient way to verify that addresses are valid before you send.

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May. 26, 2017 By Steve Tuck

Charm your SparkPost Recipient and Suppression Lists with Python

Every developer wants to test their code at scale before deploying, but how do you do that with recipient and suppression lists? We'll teach you how.

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New to email basics superhero mask
Jan. 20, 2017 By Nick Zimmerman

Email Basics for Developers Just Starting Out

Being new to the world of email is daunting. In the first part of this series, we'll walk you through the email basics of setup and deliverability.

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feedback loops
Mar. 14, 2016 By Sparky

Feedback Loops: Why They Matter & How To Use Them

Guest author Paul Midgen talks through the importance of email feedback loops and a new module that 250ok offers to get the most out of them.

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Recipient Lists in SparkPost
Jul. 8, 2015 By Aydrian Howard

How to Create, Delete, Retrieve and Update an Email Recipient List in SparkPost

Whenever you’re sending bulk email, or even email to more than a handful of recipients, it’s best to put them in an email recipient list. This is particularly true if you plan to send multiple emails to the same recipients. Otherwise, you’ll have to reference every recipient every time you send an email, and the packet will be large. You can avoid these issues by referencing a recipient list. You can create, retrieve, update and delete recipient lists using the SparkPost API.

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email vendor
Oct. 2, 2013 By Sparky

Sender Reputation Part II: Splitting Email lists across VirtualMTAs

In part I we looked at how email filtering using sender reputation has brought about a change in sending behavior necessitating admins to rethink email delivery best practices and configurations.  In Part II, we'll take a look at some different ways to optimize PowerMTA to work with the challenges introduced by reputation-based delivery.

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