Deliverability

Any developer or systems administrator worth their salt will usually start their troubleshooting process with a simple question: "Have you checked the logs?" Debugging for any application or system service often starts with looking at the logs to...

What’s sender reputation? Glad you asked. In this article, we define what sender reputation is and its components, we’ll cover our top tips, and some of the most common mistakes...

Over the past few weeks, a rising number of Mailgun customers (and industry peers across other ESPs) have encountered bounce messages. In short:

And when it fails, Outlook blocks the message, even if it meets standard DMARC policy of p=none...

Email authentication lets mailbox providers know that you’re a trusted sender – that you are who you say you are. As a Technical Account Manager at Mailgun, I’m constantly...

Imagine this scenario — you’re a sender that is sending massive amounts of email left and right from the same domain without a care in the world about your reputation. Maybe...

As an email service provider (ESP) we know how layered the email world can be. To be a successful sender, you must master everything from email deliverability, to ROI, email...

Whether you’re migrating from a legacy provider, other platform, or an in-house tool, one thing’s always true:

If you thought you were finally getting a break from the sender requirement conversation after the industry shift brought by Google and Yahoo last year, not quite. Microsoft is stepping up to the plate. In its April 2, blog, Microsoft announced new...

It's frustrating as an email sender when your messages don’t get through. Especially if you don't know why it's happening. In this article, we’ll dig into why Gmail may be blocking...

SPF doesn’t refer to how long you can wait before you have to reapply your sunblock (seriously, go get some). Instead, the term “SPF” refers to a security measure that helps...