How to track your email testing, and why it’s so important
Why tracking your email testing is a necessary but also beneficial practice, and how it can benefit your team when done correctly
Email testing
Ensure every email your product sends reaches the inbox, displays correctly and delivers the right experience. Explore practical guides on testing sign-up confirmations, notifications and other transactional emails – from SMTP basics to end-to-end testing.
Why you should be paying for your email testing service
Learn more about the scope of free email testing tools vs their paid counterparts, and scenarios they're both best suited to
Email accessibility: a practical guide to WCAG 2.2
A simple guide to the key principles of WCAG, why they're in place, and how to test your emails for them.
What your email HTML reveals (before you send)
See how you email's HTML is the best clue to how it'll render for different users
Choosing the best email preview tool for you in 2026
Rising prices or limited functionality forcing you to look for a new tool? Take a look at our side by side comparison so you can make an informed decision.
The biggest hidden complication in email and SMS testing
Learn how to ensure privacy, data protection, and secure workflows with compliant test environments for QA and automation.
The 6 checks you need to make before hitting send on an email
Eroded brand trust, poor customer experience, and damaged team morale are just some of the impacts of a broken email being shipped.
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.
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.
Top tips for email testing in CI/CD pipelines
Automate email verification, catch failures early, and protect user trust without manual guesswork.
How to write and test alt text for emails in 2026
Boost email accessibility, rendering consistency, and engagement by implementing better alt text strategies.
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.
Email preview software: the best Litmus alternatives
Let's talk email previews software; which is the best fit for your team?