Mailosaur for...

Engineering

Automate and test email and SMS workflows

Quality Assurance

Empower your team and improve email quality

Product Management

Demo and improve your product using email and SMS

Marketing

Deliver high-quality, targeted email campaigns

Solutions

Email Testing

Create end-to-end tests that depend on email

SMS Testing

Automate and use SMS messages during testing

Email Previews

View your email in Gmail, Outlook and mobile devices

Test automation

See how easy it is to automate all the tests you thought you couldn't

Features

Rules

Create automated rules that simulate every type of scenario including email bounces and out-of-office replies

Custom Domains

Unlimited recognisable email addresses for your brand

Enterprise SSO

Centralized security for your organization

Forwarding Rules

Set up rules that automatically forward your emails to certain inboxes

Links and Codes

Peace of mind that you are sending exactly what you mean to, everytime

Message Analysis

Ensuring the quality of your content is never compromised

Sending, Replying and Forwarding Emails

Seamless email and SMS interactions, every time

Virtual SMTP Servers

Use Mailosaur as a dummy SMTP server to catch every email your product sends

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Blog

Explore the Mailosaur blog for expert insights on email & SMS testing, automation, and quality assurance

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.

Abstract green background with email and mobile illustration with security icon

Best practices

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.

Abstract green background with test running dialog and pass and fail results

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.

Dark and light mode emails with Mailosaur and Mailtrap logos and running test dialogs

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.

iPhone illustration with email client logos and iPhone dialog box

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.

Mobile and email graphic with mobile, desktop, MacOS and dark mode dialog boxes on a gradient background

Mailosaur vs Competitors

Email preview software: the best Litmus alternatives

Let's talk email previews software; which is the best fit for your team?

Email and mobile phone illustration with Mailosaur and Playwright logos

Automation

Tutorial: two-factor authentication testing with Playwright and Mailosaur

An in-depth guide showing you how to test two-factor authentication with Playwright and Mailosaur.

MFA and 2FA

Tutorial: How to Automate Testing of Two-Factor Authentication with JMeter and Mailosaur

This will show you how to test two-factor authentication using SMS, or an authenticator app, with Mailosaur and the cross-platform JMeter automated testing tool.

Mobile phone illustrations with pass and fail notifications and Mailosaur dashboard

Mailosaur vs Competitors

Mailosaur still supports SMS short codes (unlike some alternatives)

If your automated tests rely on receiving SMS from short codes, here’s a critical update: Mailosaur continues to support short code inbound SMS, while others no longer do.

Illustration of testing framework logos. 2024: year in review in text

Best practices

Major updates, changing habits – The automated testing year in review

How Selenium, Playwright, WebDriverIO, and more changed in 2024 – and how users changed their relationship with their testing frameworks.

Selenium

How to test links and codes for Black Friday deals with Selenium

Practical steps for QA testers to test promotions and discounts via email and SMS.

Playwright

How to test login functionality using OTP codes with Playwright

Broken or unreliable login systems can lead to frustrating user experiences, potential security vulnerabilities, and lost trust.

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