The ultimate guide to email testing tools

The ultimate guide to email testing tools

Any email marketing plan should test your email newsletters. Doing so includes ensuring the email is error-free, adequately formatted, has valid HTML, and has high deliverability. Here's a rundown of the top email testing tools to try out.

Email Testing Tools - Why Should You Use them?

The marketing team needs to take care of the ongoing promotional efforts, mainly email marketing. Your email newsletters' effectiveness relies on your team's focus while setting up the campaign. Email testing is as critical as design and campaign tracking if you wish to make the most out of all your emails.

Tools for HTML Testing


Mailtrap operates as a bogus SMTP server to simulate the sending and collecting emails during development. It scans the email and essentially checks the HTML email campaign.


Litmus provides marketers with numerous useful features, including a built-in editor, campaign tracker, etc. The platform supports over 90 browsers, email clients, and screen sizes.


Putsmail is an HTML validation tool that enables marketing groups to send numerous emails to their team members or mailboxes to test them. It is also available as a Google Chrome extension.

Accessible Email

Accessible email is free testing software used mainly by experts and business developers. The tool gives clearly outlines the room for improvement.

MailSlurp testing

MailSlurp is an advanced email testing platform for testing every type of email solution. Create unlimited email accounts for disposable email and fake mail boxes.

Tools for Email Preview*

Email on Acid

Email on Acid is a complete-featured testing tool that provides marketing firms with assurance about how their message is displayed to browsers and clients. It also covers ISPs, operating systems, etc.

Preview My Email

Although unsophisticated, this tool is an intriguing alternative to the Inbox Inspector. It lets you evaluate email designs across different platforms.


Primarily used as an email template creator and editor, Stripo allows you to view emails on 70+ platforms. With each paying plan, you also receive numerous free email tests.

Tools for Tracking Sender Reputation

Sender Score

Sender Score helps marketers discern the sender's reputation. Register, input your IP address, and permit the platform to scan. Emails will be numbered between 0 and 100 representing the sender's reputation.


Postmark gives a free spam score, which is displayed on the page. Through SpamAssassin, the platform verifies your message and shows your score.

Reputation Authority

Reputation Authority monitors reputation by enabling marketers to gather data on brands across social media platforms. Also, it gives a broad overview of the brand's perception.


Dmarcian assists businesses with DMARC deployment, monitoring, and email authentication. It also offers numerous email authentication tools.

Tools for Monitoring Deliverability

Deliverability is an important aspect of email sending and testing.


GlockApps provides ways to improve email deliverability and spam scores. It deals with these issues through multiple stages of an email campaign.


Mail-tester assesses deliverability within seconds. Just send the email to the given address and receive your grade.

Send Forensics

Send Forensics is intended for enterprise brands and ESPs. Just register to use the free email deliverability tool.

Simple Steps to Adress Email Deliverability Issues

  • Clean Email lists
  • Warm up the IP and email addresses
  • Take subscriber's consent
  • Fix HTML and enhance email responsiveness

Related content

Golang email library for sending and reading emails

Golang Email Library for sending and receiving emails in Go over SMTP or HTTP/S.

Email for testing

Test email accounts for email testing. Alternatives to Mailinator, MailTrap, Mailosaur and more.

The best test email tools compared

How to test transactional email campaigns and email verification using the best free and paid tools.

How to wait for Selenium to start during Codeception tests

Example tutorial for how to wait until webdriver and Selenium have started during Codeception PHP tests

How to test that an email is received using Cypress JS.

Use Cypress JS to test emails are received and validated during end-to-end testing.

Email API for email marketing and more

APIs for email marketing and social campaign testing. Send, receive, validate and test emails in code and online.

How to test an email address

Test email accounts for testing email addresses in code or online. Create fake email accounts for testing.

How to start selenium in a background process and wait for it to start

Spawn Selenium server process before tests start for easier acceptance testing.

The ultimate guide to email testing tools

The ultimate guide to email testing tools

CypressJS Example

Test email sign-up, password verification and more with Cypress JS and MailSlurp. Capture OTP magic links and test auth flows end-to-end.

CypressJS Email Testing

Use real email accounts in CypressJS to test user sign-up, email verification, and more.

Golang mail Library (SMTP)

How to send and receive emails in Go (test email addresses).

Java JVM Examples

Test email sending and receive emails without a mail server.

TestNG Selenium Java Example

Testing user sign up in Java using TestNG and MailSlurp test email accounts

Codeception PHP acceptance testing using real email address APIs

Write acceptance tests in PHP with real email addresses using Codeception and MailSlurp

PHP Email Test Plugins: send and receive email in PHPUnit (example code)

How to send and receive emails in PHPUnit tests.

PyTest Email Testing

Send and receive email in Pytest Python tests.

Java, Selenium

Receive emails in Java test suites using MailSlurp, Junit, and Selenium.

Receive email in PHP: using MailSlurp to send and receive emails

Test email in PHP using real email addresses

Testing authentication using real email addresses in Ruby with Capybara, Cucumber, and Selenium

Cucumber example project using Capybara to test user authentication using real email addresses.

Test applications with real emails using Serenity BDD, JBehave and Selenium

Email acceptance testing with Serenity and MailSlurp. Test applications with real email addresses.

Specflow user sign-up testing with MailSlurp accounts

How to test .NET authentication and sign-up using real email accounts with MailSlurp and SpecFlow.

Jest, Puppeteer

Test email accounts in React with Jest and Puppeteer. Send and receive emails in Javascript.

.NET Selenium C#

Send and receive email in DotNET Nunit tests using Selenium and MailSlurp.

Cucumber, Ruby

Generate test email accounts with Ruby and Cucumber. Test email sign-up, password verification and more.

Webdriver, JS, WDIO

Test email related processes like sign-up and verification using WDIO WebDriver and MailSlurp.

TestCafe end-to-end MFA testing for user sign-up and email verification

End-to-end testing with MailSlurp, NodeJS, and TestCafe.

Testing guide

Integration testing with disposable email accounts using CypressJS, Selenium and many other frameworks. Test OTP password login, transactional emails, notifications and more.

How To Test Emails Before You Send

There are many free tools to test emails before sending. This can help prevent spam warnings and increase deliverability.

Testing OTP password link username and password for 2 factor authentication (2FA)

Testing OTP password link username and password for 2 factor authentication (2FA)

Test email address

Free test email address for testing emails online with web dashboard or REST API.

How to test 2FA OTP login using SMS codes with Playwright

The ultimate guide to testing OAuth one-time-password flows with real SMS MFA. Use Playwright to automate authentication tests with programmable TXT message APIs.

Testing email with Cypress test email accounts

Test email accounts for CypressJS. End-to-end testing with real email addresses using MailSlurp Cypress plugin.

Testing Webhooks

How to test HTTP webhooks using MailSlurp test hooks.

Testing Email with Cypress JS and MailSlurp

Email testing with Cypress JS

Ready to dive in?Start building email applications today.