Product
The Next Generation of Email QA: Mailgun Inspect
For years, Email on Acid helped email marketers preview, test, and perfect their email campaigns before hitting send. But as the email landscape evolved with new accessibility requirements, complex deliverability challenges, and changing customer requirements, the need for a more powerful, integrated platform became clear.
Now arriving, the future of email quality assurance – Mailgun Inspect. More than a replacement, Mailgun Inspect is a complete evolution – a robust, essential solution designed for enhanced speed, security, and QA functionality.
Why Mailgun Inspect is the future
Mailgun Inspect isn’t just a new iteration of Email on Acid – it’s a complete rebuild, engineered from the ground up on the Mailgun platform. This new foundation allowed us to create a truly comprehensive email QA suite that integrates Mailgun’s core capabilities while giving us the freedom to accelerate innovation. The result is an industry-leading solution purpose-built for today’s complex email landscape – something that simply wasn’t possible within the legacy Email on Acid framework.
A new era in email quality assurance offers:
| Advanced Accessibility Features | With the European Accessibility Act, our new accessibility check will help ensure your emails are compliant with the latest Web Content Accessibility Guidelines (WCAG) 2.2. |
| Enhanced Security & Compliance | ISO 27001, ISO 27701, SOC II, GDPR, HIPAA compliance, and more to meet the needs of customers large and small – from enterprise to subscription. |
| Team-Friendly Access | Enjoy the convenience of unlimited user seats and Single Sign-On (SSO) for easier collaboration across your teams. |
| A Unified Platform | Manage your entire email lifecycle, from testing to sending and analysis to deliverability, all within a single, integrated platform. |
| Greater Value | New tiered pricing for contract customers gives more cost-effective access to the larger breadth of features. |
| Future Innovation | The leading edge of email quality assurance will reside with Mailgun Inspect, offering a roadmap of innovative, future-ready tools designed to reliably scale and strengthen your email program. |
What’s next in Mailgun Inspect innovation
As we continue to deliver on the promise of keeping Mailgun Inspect at the forefront of email QA we will continue to deliver over the next year and beyond on some exciting new innovations:
- Built-In Code Editing: Inspect and modify email HTML directly within the platform, making it easier to troubleshoot and fix rendering issues quickly.
- Automatic Issue Resolution: Automatically click-to-fix common email issues discovered during testing, dramatically reducing the manual work required to fix problems.
- Enhanced team collaboration: Simplified commenting and approvals for streamlined team access and collaboration
- Personalized Guidance: AI powered, personalized recommendations that help teams understand which issues matter most and how to resolve them quickly.
- AI visual analysis: Intelligent, built-in QA checks to identify issues you may have missed like dark mode errors
Over time, Mailgun Inspect will evolve toward AI assisted email QA, helping teams not only identify issues but also resolve them faster and more efficiently. These capabilities will help transform email QA from a streamlined testing process into an intelligent workflow.
Note: All product roadmap features are subject to change or discontinuation
Providing a seamless transition & what’s next?
We are committed to making the transition to Mailgun Inspect as smooth as possible for our Email on Acid customers.
For our contract customers
All Email on Acid (front-end and API) features and functions will resume exactly as expected through the remainder of your contract term. When it’s time to renew, you will be connected with our Customer Success Team. Email on Acid contracts will begin transitioning to Mailgun Inspect in June 2026.
We are offering custom pricing to help you get started. And our new usage-based pricing model gives you more control over your costs, allowing you to choose to test only the devices that are most relevant to your audience.
For our subscription customers
We’re excited to introduce new plans that are both competitively priced and thoughtfully designed to deliver maximum value. These plans are now live on the Mailgun Inspect Pricing Page and include the features that matter most to your success.
Beginning in June 2026, current Email on Acid subscription customers will start transitioning to Mailgun Inspect. Customers on annual plans will migrate at the end of their current term to ensure a smooth and uninterrupted experience.
Key takeaway
Mailgun Inspect represents the next chapter in intelligent email QA, built for the complexities of modern email marketing and the speed of real-world communication.
Mailgun Inspect marks the next generation of our email quality assurance tools, succeeding Email on Acid. Mailgun Inspect incorporates the robust QA capabilities our users trust, now fully integrated into the high-performance Mailgun platform. This transition provides senders with a single, convenient platform to manage the entire email lifecycle, from pre-send testing to delivery, deliverability, and post-send analysis.
No, Mailgun Inspect, Send, and Optimize can all be purchased at the subscription level independently. Mailgun Validate can only be sold independently as an enterprise contract plan but is available in subscription plans for Mailgun Send and Optimize.
Yes. Beginning in June 2026, current Email on Acid subscription customers will start transitioning to Mailgun Inspect, our next-generation email quality assurance platform. Customers on annual plans will migrate at the end of their current term to ensure a smooth and uninterrupted experience.
Mailgun Inspect builds on the trusted capabilities of Email on Acid while introducing expanded QA tools designed to help teams test more thoroughly, streamline pre-send workflows, and send with even greater confidence. Please note that existing previews and tests will not be transferred during migration.
Current Email on Acid subscribers will receive a special migration discount for Mailgun Inspect. Details on this offer will be shared soon within the application and via email.
Mailgun Inspect includes email preview, image validation, link validation, accessibility checks, content spam analysis, and code analysis. It allows users to test email HTML across 100+ devices and clients. The accessibility checks are based on the latest W3 Web Content Accessibility Guidelines, in line with the European Accessibility Act (EAA).
Yes, Mailgun Inspect can be used with any email service provider. This means you do not need other Mailgun products to use Mailgun Inspect.
You don’t need to be technical to use our platform. We have everyone from first time marketers to seasoned email developers using our platform every day.
No, if you are looking to send email via SMTP or API you need to use an email service provider like Mailgun Send.
If you use more email preview tests than allotted in the plans, please reach out to our customer success team here to discuss high-volume options.
Yes, both Basic and Premium Mailgun Inspect subscription plans offer a 30-day free trial.
