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Product
7 min
Forrester TEI study reveals Sinch Mailgun ROI and outcomes
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Featured blog posts
Product
7 min
Forrester TEI study reveals Sinch Mailgun ROI and outcomes
Read More
10 min
Email metrics explained: Understanding email performance
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12 min
Navigating global data compliance and regulations in 2025
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IT & Engineering
9 min
Email security and infrastructure: Cloud-based vs. on-premise
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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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What is DKIM: Learn how it works and why it’s necessary
Are you who you say you are, or are you a spoofer in disguise? Answering this question is what DKIM is all about. As email usage and capabilities continue to grow, it’s important to...
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Verifying emails using Python 3.9+ and the Mailgun API
Mailgun's Bulk Email Validation API is designed to make email verification both scalable and efficient. With it, developers can validate entire lists of email addresses, checking...
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Reading Time: 11 min
Rajkumar Venkatasamy
Rajkumar has nearly sixteen years of experience in the software industry as a developer, data modeler, tester, project lead, product consultant, data architect, ETL specialist, and technical architect. Currently he is a principal architect at an MNC. He has hands-on experience in various technologies, tools, and libraries.
What is SMTP and how does it work?
SMTP, though a pillar of email delivery, often gets lost in the jumble of tech terms and acronyms. But if you're ready to send impactful emails, this is one of those acronyms that...
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...
Read More
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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What is DKIM: Learn how it works and why it’s necessary
Are you who you say you are, or are you a spoofer in disguise? Answering this question is what DKIM is all about. As email usage and capabilities continue to grow, it’s important to...
Read More
What is SMTP and how does it work?
SMTP, though a pillar of email delivery, often gets lost in the jumble of tech terms and acronyms. But if you're ready to send impactful emails, this is one of those acronyms that...
Read More
Email marketing deliverability: Whose job is it anyway?
Your business depends on being able to connect with people via email. That’s true for both transactional messages and promotional campaigns. But who is ultimately responsible for making sure those messages reach the inbox ...
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Key takeaways from Mailgun’s State of email deliverability 2025
Changes from major mailbox providers thrust the topic of email deliverability best practices into the spotlight over the last year. Our new, interactive report
State of email deliverability 2025
shows there are signs of improvement, but...
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