![]() The result is a markup language that abstracts away an entire layer of complexity related to responsive HTML email design.īut why do we need this layer of abstraction? Why can't we just design HTML emails using the same HTML and CSS used throughout the web? Their team has spent years diving deep into the complexities of HTML email and understanding the differences between all the different email clients. MJML, or Mailjet Markup Language, is an open source project created by the development team at Mailjet. We will implement an email design together step-by-step to demonstrate how MJML can simplify your email development process. In this post we'll tale a look at MJML, a tool we've found useful for creating responsive HTML email designs. Two of the most popular frameworks that we considered were MJML and Foundation for Emails. In these situations having a robust, standardized way of creating emails can be very beneficial. Choose a framework when you need to produce many email templates with shared components, and when you will have multiple developers working with your email templates. The third and, in our opinion, most robust option is to use an email framework. A popular one is Email Boilerplate on GitHub. This is a viable option if your emails designs are very simple and you are alright with some degree of degradation on older email clients.Īnother option is to find a boilerplate HTML template somewhere online that can be modified to fit your needs. The first, and least ideal, is to build out our emails from scratch. Luckily we have options when it comes to creating responsive HTML emails. Some don't even support HTML, which can cause email delivery issues.Īnd making your emails responsive for mobile devices? You'll need pretty deep understanding of the differences between all of the different email clients to land on a one-size-fits-all email design. There are a lot of email clients out there, and they all parse HTML a *little* bit differently. I don't have any experience with their services but they provide a free knowledgebase.The unfortunate truth is that crafting emails in HTML can still be a tedious and time-consuming task. htmlemailcheck is a commercial offering to help you checking email rendering in various environments.email-bugs is a github project which contains a lot of knowledge about rendering quirks in various email clients.MJML.NET: This is an unofficial port of mjml to C# ( github repo) which supports more components than this Python implementation.That library integrates the mjml JavaScript implementation with Django templates so you can access all mjml features. django-mjml: If deploying NodeJS is not an issue and you are using Django you could use the well established django-mjml library.I'd love to see your pull requests to improve the current state though. However we are nowhere near that right now! The current code can render the "Hello World" example as well as images, tables and groups but many components remain to be reimplemented. The idea is to implement the mjml XML dialect exactly like the JS implementation so eventually you should be able to use the official docs and other online resources found on mjml.io. ![]() CPython uses ~70ms to translate a trivial mjml template to HTML while Node.JS needs ~650ms. As the startup overhead of CPython is much lower than Node.js we can also generate a few mails via CLI applications without massive performance problems. ![]() Currently the library is deployed in some light production scenarios.Īnother benefit of using Python is that we can integrate that in our web apps more closely. MJML's API offering).Īfter a short spike to check the viability of a Python implementation I went ahead and wrote enough code to ensure some existing messages could be converted to mjml. Also due to data-privacy concerns we were unable to use any third-party products (i.e. ![]() We did not feel comfortable auditing all 220 JS packages which are installed by npm install mjml (and re-doing this whenever new versions are available). While I like the idea behind mjml and all the knowledge about the quirks to get acceptable HTML rendering by various email clients we did not want to deploy a Node.js-based stack on our production servers. However even under the best circumstances this library will always lag a bit behind as each change must be translated to Python manually (a mostly mechanical process). This library should track the JS version of mjml so ideally you should get the same HTML. The upside is that there are lot of possibilities for you to make a real difference when you improve the code :-) Goals / Motivation Also the code likely contains many additional bugs. minification, beautification and validation). It lacks several features found in the JavaScript mjml implementation (e.g. This library only implements a subset of the original MJML project.
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