Best practices
The most common email rendering issues in 2026 (and how to fix them)
Designing HTML emails that render consistently across inboxes remains one of the biggest technical challenges in digital communication.
Blog
Explore the Mailosaur blog for expert insights on email & SMS testing, automation, and quality assurance
Best practices
The ultimate guide to SMS testing
From manual checks to fully automated workflows, here’s how to test SMS with confidence.
Mailosaur vs Competitors
The ultimate email testing tool: comparing Mailosaur and Mailtrap
Wondering which email testing tool is best for your team? Check out a real side by side comparison and make an informed choice.
Best practices
Top tips for email testing in CI/CD pipelines
Automate email verification, catch failures early, and protect user trust without manual guesswork.
Best practices
How to write and test alt text for emails in 2026
Boost email accessibility, rendering consistency, and engagement by implementing better alt text strategies.
Best practices
Flaky email tests; the problem, causes and solutions
Don't let flaky tests impact your release times, drive-up maintenance costs, or impact your team morale.
Playwright
Automate email verification testing in Playwright (links + OTPs)
Test email verification flows, including magic links and OTPs quickly and easily with Playwright
News
How Selenium 4.40 improves end-to-end email verification testing
What's changed in Selenium 4.40 and how will it benefit you when testing email verification flows?
Best practices
How modern emails are structured (and how to test them)
Understand the anatomy of a modern email, from headers to HTML, and how to reliably test them with a dedicated email testing tool like Mailosaur.
Mailosaur vs Competitors
Email preview software: the best Litmus alternatives
Let's talk email previews software; which is the best fit for your team?
Best practices
Functional vs non-functional: Which should I use for email testing?
Functional testing makes sure the information input into the system outputs the correct results, and non-functional testing covers parameters that functional testing doesn’t, like security, reliability, and performance.
News
How will your emails look on Apple’s iPhone 17?
Mailosaur offers coverage for the brand new iPhone 17, iPhone 17 Air and iPhone 17 Pro Max, allowing you to preview your emails across the board.