Mailgun's Transactional Email Templates is an open-source collection of responsive HTML email templates designed for transactional messages sent automatically from applications.
What is the Transactional Email Templates collection?
It is a set of ready-to-use HTML email templates from Mailgun, covering common transactional email types such as action confirmation, email alerts, and billing invoices. Each template is responsive and has been tested across major desktop, web, and mobile email clients. The repository provides both source templates with separate CSS files and pre-inlined versions for direct preview.
Key Features
- Three common transactional templates — Action email, Email alert, and Billing email cover the most frequent transactional use cases.
- Responsive design — Each template adapts to different screen sizes for mobile, desktop, and web clients.
- Tested across popular clients — Verified with Email on Acid to work in major desktop, web, and mobile email clients.
- Two delivery formats — Original files with a separate CSS stylesheet plus pre-inlined CSS versions in the
/templates/inlinedfolder. - Premailer integration — Recommended tool for inlining CSS before sending, with explicit guidance in the README.
- Grunt-based workflow — Links to a Grunt task for compiling and testing emails, used in the design process.
Who is it for?
- Software developers building transactional email flows (welcome emails, password resets, receipts) into their applications.
- Startups and product teams needing quick, tested email layouts without designing from scratch.
- Email marketers or operations staff who want boilerplate templates to adapt for automated notifications.
What can you do with it?
- Action emails: Send users a confirmation or prompt with a clear call-to-action button.
- Alerts: Notify users of account activity, support responses, or app errors.
- Billing: Deliver monthly invoices, receipts, and payment-related notifications.
How does it work?
Download or clone the repository, pick a template, and either use it as-is or customize the HTML and CSS. Before sending, run the CSS through Premailer to inline styles, or use the pre-inlined versions in the templates/inlined folder. Then integrate the resulting HTML into your transactional email system.
FAQ
Are these email templates free?
Yes, the repository is open-sourced by Mailgun, so the templates are free to use and modify.
Do I need to inline the CSS before sending?
Yes. The README explicitly states that you should inline CSS before sending HTML emails, and recommends Premailer for this task.
What email clients were tested?
The templates were tested across major desktop, web, and mobile clients using Email on Acid, though the exact client list isn't specified.
Can I add more templates?
The repo appears to be a curated collection; you can fork it and add your own, or use the Grunt task mentioned to build custom templates.
Is the Grunt task included in the repository?
No, the Grunt task is a separate project linked from the README, not part of this repository itself.
