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  • Email DIY

Understanding DKIM: How It Works and Why It's Necessary

As email usage and capabilities continue to grow, it’s important to make sure that your sender reputation is staying positive and secure. One of the best ways to do this is to use DKIM (short for DomainKeys Identified Mail). If the idea of yet another email acronym is throwing you off, don’t be alarmed. We’ll walk through the basics–and benefits—of DKIM to illuminate its purpose and value to sender organizations.

Mary Dolan
• 6 min read
  • What's new

We Did It: Risk-Free Email Validation From Mailgun

As deliverability experts, we know how important a healthy email list is. It’s crucial to get emails into your recipients’ inboxes and to ensure you’re building a successful email program. That’s why we’re excited to announce a new bulk preview feature addition to our email validation service.

Jorge Miramontes
• 3 min read
  • Email DIY

Which SMTP Port Should I Use? Understanding Ports 25, 465, & 587

It's a common question that we receive here at Mailgun about SMTP port numbers. To ensure connectivity to our Simple Mail Transfer Protocol (SMTP) endpoint, Mailgun offers multiple SMTP port options, but which one should you use to send email messages? We’ll take a historical look at each SMTP port and then we'll discuss today's methodology for outgoing mail usage.

Mailgun Team
• 7 min read
  • Best Practices

How To Improve Email Open Rates

Sending emails that don’t get opened can be frustrating—you’ve crafted the most engaging content, used a witty subject line, and even included a hilarious, relatable gif from The Office. What is going on with your low open rates?

Mary Dolan
• 8 min read
  • Best Practices

Preparing Your Email Infrastructure Correctly

With the number of global email users set to grow to a huge 4.48 billion users in 2024, email certainly is the right marketing channel for establishing seamless communication with your customer base. In fact, the number of emails sent and received every day across the world is projected to increase to over 347 billion daily emails by 2023. Therefore, if you leverage email marketing the right way, you can boost both your sales and ROI.

Kevin George
• 8 min read
  • Best Practices

When Should You Use An Email API?

In the worlds of email marketing and email technology, email APIs are a very important tool--they’re a big part of what we do here at Mailgun. However, if you have had little experience with them, email APIs may sound like just another confusing acronym to keep track of--like SEO, STO, and maybe even your ABCs (let’s be honest, Q doesn’t even sound like a real letter). But never fear--in this article, we’ll tell you exactly what an email API is, when you can use it, and how your usage can benefit your email delivery goals. Let’s get started!

Mary Dolan
• 5 min read
  • Best Practices

4 Tips To Improve Your Email Deliverability In 2021

Done well, an email program is one of the most valuable tools at an organization’s disposal. It can help you achieve a high delivery rate, which is the rate at which your email is successfully delivered to a target audience. However, if done poorly, your program may result in low delivery rates, fewer customers, and delayed orders or services. Take a look below at four common delivery issues and how you can avoid them.

Mary Dolan
• 7 min read
  • What's new

Mailgun Partners with Verizon Media as View Time Optimization Provider

Today, we’re proud to announce our partnership with Verizon Media Group as the first View Time Optimization (VTO) campaign provider. 

Mailgun Team
• 2 min read
  • Best Practices

COVID-19 Email Communications Dos and Don’ts

As COVID-19 expands rapidly across the globe, we are observing more brands try to send email communications to their subscribers about the pandemic and how it is impacting their business. Even though all brands are affected one way or another, certain industries need to send critical updates to their customers, such as travel, hospitality, and the entertainment industry, with regards to cancelations, refund policies, and change fees.

Kate Nowrouzi
• 4 min read
  • For devs

How To Use Parallel Programming

If you’re unfamiliar with the concept of parallel programming, it probably sounds like something out of Star Trek or a creepy Black Mirror episode (the machines were watching us all along). However, in the real world, parallel programming is something you can use to save time and quickly accomplish business goals. In this post, I’ll be covering the basics of parallel programming and its pros and cons—no creepy machines necessary.

Mary Dolan
• 3 min read
  • What's new

Mailgun’s COVID-19 Plan of Action

Here at Mailgun, we're continuously monitoring the situation surrounding the coronavirus (COVID-19) pandemic. Our team is working around the clock to ensure the continued health and safety of our employees, as well as the continuity of our business and the continued support of you, our customers.

Mailgun Team
• 2 min read
  • Security

Password Meters Are Not For Humans

Mailgun takes the security of our users’ accounts very seriously, and when it comes to a compromise of an account - no one is having any fun. With so many things that can contribute to an account compromise, we took a step back to look at the various attack vectors used by bad actors trying to gain access to accounts.

Patrick Tilley
• 8 min read

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