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Helpful articles to optimize your email program.

The best email APIs in-depth review and comparison

In 2025, email APIs have become indispensable for businesses looking to streamline their communication processes. These APIs not only automate sending and tracking emails but also ensure high deliverability and compliance with global standards. Whether you're a developer or marketer, the right email API can significantly...

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How to optimize your email strategy for 2025

Email is the digital cornerstone of communications between brands and consumers. Yet in 2025, ensuring emails reach the inbox – not just get sent – is more challenging than ever. Evolving mailbox provider rules...

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The 5 best email API services in 2025

In 2025, email APIs are critical for businesses aiming to automate large-scale communications while ensuring top-notch deliverability and compliance. Developers and marketers alike need solutions with reliable infrastructure, developer-friendly tools, and integrations to support...

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IMAP vs POP: What’s the difference?

We’ve talked about how email works and how email protocols facilitate the transfer of your emails along the way, from when you hit send to when your subscriber reads your email...

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The European Accessibility Act: What you need to know

Accessibility matters. Whether you’re a business leader or a software developer, ensuring your products and services are accessible isn’t just good practice—it’s also becoming a legal requirement across the European Union with the European Accessibility Act (EAA), a game-changing directive ...

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“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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Navigating global data compliance and regulations in 2025

Protection from loss, theft, and corruption – these are the goals of data privacy regulations. Adhering to these regulations makes you a trusted sender but it takes...

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BFCM 2024: How email and omnichannel communications drove holiday success

Black Friday and Cyber Monday represent peak email sending periods that can make or break retailers' holiday success. During November...

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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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Email industry benchmarks and deliverability stats: Insights from 2024

As 2024 comes to a close, it’s the perfect time to reflect on the email marketing trends that shaped the year. Understanding the benchmarks from 2024 can help you craft even...

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