letter_opener_web VS Cerberus

This gem makes sure you don’t embarrasingly send emails to real users whilst developing or testing, life-saver!

Also a note that might be obvious, but just in case: you really only want to use SendGrid in production. When you're developing locally you can use something like LetterOpener to view and test mail as needed.

Let’s start with one of the features that was most requested in my previous posts: Keila now has a WYSIWYG block editor! – Screenshots With the new editor comes a new base template which is based on Cerberus Hybrid and which looks great on pretty much all email clients, even tricky ones like Windows Mail.

I recommend you look into these templates: https://www.cerberusemail.com/

We have been using Cerberus since 2015, rock solid: https://github.com/TedGoas/Cerberus

Try out https://tedgoas.github.io/Cerberus/ It’s the best that I have found. Plus, you can chose between different layouts

Email templates are nothing but hacks, I've found. Here's the template I use for email, though I don't think it supports the layout you're going for. Try googling "email templates github" and see if any open source options have a solution.

Not a framework but I’ve found Ted Goad’ Cerberus templates very useful.

I customized them, extracted them into modules and created a design system which I then translated to an email CMS.

Coverage is pretty good although Outlook still glitches in some circumstances.

https://tedgoas.github.io/Cerberus/

FWIW caniemail is unreliable and does not have full coverage.

Also with this level of complexity I’d rather start with a few tested patterns than navigate the insane labyrinth of email client inconsistencies.

Keila currently comes with one template. It’s based on the wonderful Cerberus Fluid Template and looks great on mobile! Future versions will of course let you modify the template to your heart’s content.