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Everything you need to start building connected experiences.

Streamlining bulk email sending with custom queue management using Mailgun’s API

Sending bulk emails requires quite a bit of finesse and care. Several factors add to the complexity, including throttling and rate limits set by mailbox providers to control the flow of emails, data protection laws that must be adhered to, and deliverability issues...

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Your guide to using webhooks

You already know that email isn’t a send-and-forget thing. When you’re sending a message, you want to know how to track it and respond to any issues, right? After all...

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Building transactional email workflows for order confirmations with Mailgun’s API

Unlike marketing emails, transactional emails (such as order confirmations, shipping notifications, and password resets) are triggered by specific user actions and provide real-time updates on their interactions with your platform. They help build trust, cut down on support questions, and make for a smooth shopping experience. In this tutorial, you'll learn how to build a transactional email workflow for order confirmations using Mailgun's API.

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How to authenticate your email for better delivery rates

Email authentication protocols like SPF, DKIM, and DMARC verify sender identity, prevent spoofing, and support a strong sender reputation. This post explains how these protocols work, how to configure them, and how to confirm they’re set up correctly...

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Which SMTP port should I use? Understanding ports 25, 465 & 587

It's a common question that we receive here at Sinch Mailgun about SMTP port numbers. To ensure connectivity to our Simple Mail Transfer Protocol (SMTP) endpoint, Mailgun...

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Designing HTML email templates for transactional emails

Styling HTML email templates is painful. Tables, inline CSS, unsupported CSS, desktop clients, web clients, mobile clients, and various device sizes are all things that influence...

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SMTP error codes and what they mean

SMTP, or

Simple Mail Transfer Protocol

, is the language servers use to talk to each other when sending emails. When something breaks during that conversation, the server returns a code to explain what happened. These

status codes

offer valuable insights, helping you figure out what went wrong and how to fix it...

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Microsoft Outlooks new sender requirements: What you need to do by May 5

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...

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Why is Gmail blocking my emails? How to prevent it

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...

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