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Deliverability
11 min
Key takeaways from Mailgun’s State of email deliverability 2025
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Featured blog posts

Deliverability
11 min
Key takeaways from Mailgun’s State of email deliverability 2025
Read More

3 min
The European Accessibility Act: What you need to know
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12 min
Navigating global data compliance and regulations in 2025
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Product
5 min
Announcing new analytics features to maximize your email performance
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Resources
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Case studies
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The state of customer communications in 2025: What email marketers need to know
In the report, over 4,000 consumers and business leaders weighed in on the challenges and opportunities for customer communications in 2025. The top challenges?
Security and privacy, chosen by 44% of respondents, and integration complexity, selected by 38%.
Read More
Top 6 SendGrid alternatives
If you’re looking for a new ESP, this post breaks down six top-tier SendGrid alternatives. We’re looking at things like reliable email APIs, transactional messaging features, and varying levels of deliverability tools. Whether you need...
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5 best email service platforms with free plans
We’ve evaluated five of the most reliable email service platforms offering free tiers. Each provider has a different take on what “free” means, so we’ve broken it down for clarity.
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How to debug email issues in real-time using Mailgun logs
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...
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Reading Time: 8 min

Thinus Swart
Thinus has been interested in computers and technology ever since the day he painstakingly typed out every line from a library book about BASIC games into a ZX Spectrum as a young child. From there, he's been employed as a developer, a network admin, a database admin, and a Linux admin, all in the pursuit of building up his knowledge. He considers himself a 'jack-of-all-trades, master of some'. He is currently employed as a cybersecurity specialist at a large financial services company in South Africa, making full use of his Splunk Architect certification to analyze the terabytes of data that a company of that size can generate daily.
The state of customer communications in 2025: What email marketers need to know
In the report, over 4,000 consumers and business leaders weighed in on the challenges and opportunities for customer communications in 2025. The top challenges?
Security and privacy, chosen by 44% of respondents, and integration complexity, selected by 38%.
Read More
Top 6 SendGrid alternatives
If you’re looking for a new ESP, this post breaks down six top-tier SendGrid alternatives. We’re looking at things like reliable email APIs, transactional messaging features, and varying levels of deliverability tools. Whether you need...
Read More
5 best email service platforms with free plans
We’ve evaluated five of the most reliable email service platforms offering free tiers. Each provider has a different take on what “free” means, so we’ve broken it down for clarity.
Read More
“Email failed to send” – understanding the error message?
Let’s say you’ve integrated your app with email functionality, designed some great email content, developed a marketing strategy, and you think you’re good to go. But then you...
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How to debug email issues in real-time using Mailgun logs
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...
Read More
Reading Time: 8 min

Thinus Swart
Thinus has been interested in computers and technology ever since the day he painstakingly typed out every line from a library book about BASIC games into a ZX Spectrum as a young child. From there, he's been employed as a developer, a network admin, a database admin, and a Linux admin, all in the pursuit of building up his knowledge. He considers himself a 'jack-of-all-trades, master of some'. He is currently employed as a cybersecurity specialist at a large financial services company in South Africa, making full use of his Splunk Architect certification to analyze the terabytes of data that a company of that size can generate daily.
10 ways to improve and protect your sender reputation
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...
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DKIM pass, bounce anyway? Outlook's new mystery rejection
Over the past few weeks, a rising number of Mailgun customers (and industry peers across other ESPs) have encountered bounce messages. In short:
DKIM appears to pass in one place (like Gmail or your DMARC reports) but fails at Microsoft.
And when it fails, Outlook blocks the message, even if it meets standard DMARC policy of p=none...
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Email authentication: Your ID card for sending
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...
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