Message testing
Email and SMS sit at the centre of critical user journeys. Ensure they function as intended and get customers to where they need to be.
Trusted by companies across the board
Test how emails and SMS behave in real user journeys
From signing up and logging in to confirming transactions and receiving alerts, email and SMS sit at the centre of critical user journeys. If they fail, the experience breaks immediately.
Mailosaur helps teams test how messages behave in real workflows, so everything works as expected before it reaches customers.
Validate every part of your message flow
Timing and triggers
Ensure messages are sent exactly when expected and reflect real user actions.
User interactions
Verify links, calls to action, and navigation paths behave as intended.
Cross-channel journeys
Test how email and SMS work together as part of a complete experience.
Send the right message at the right moment
Whether it’s a password reset, onboarding step, or transaction alert, even small delays or mistimed triggers can disrupt the user journey and reduce trust.
Mailosaur allows teams to validate when and how messages are sent, ensuring they are triggered correctly, arrive in the right sequence, and reflect real user actions across both email and SMS.
Test message behaviour, not just delivery
Most tools confirm that a message was sent. Mailosaur helps you verify that it works, so you can:
Confirm messages trigger at the correct moment
Validate links and calls to action
Ensure navigation flows behave as expected
Test real user journeys end to end
Validate authentication and critical flows
Customers rely on one-time passcodes, magic links, and verification messages to access their accounts. When these fail, users are locked out, journeys break, and support requests increase.
With Mailosaur, teams can validate expiry rules, retry behaviour, and edge cases as part of a complete authentication journey, covering real-life possibilities before you even hit send.
Reduce risk before it reaches production
Mailosaur helps teams shift message validation earlier in the development process.
Catch issues before customers experience them
Reduce last-minute fixes and rework
Improve confidence at launch
Deliver more reliable user journeys
Message behaviour is only part of the picture
Functionality testing goes hand in hand with email rendering testing.
Rendering issues such as broken layouts or accessibility problems impact how messages appear and whether users can engage with them. The email designer validates rendering across clients and ensures they meet accessibility standards, so they display correctly for every recipient.
Give it a go
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With a free 14 day trial and easy integration, it couldn't be easier to get started with Mailosaur.