AwesomeMailer

AwesomeMailer is an ActionMailer extension that supports rad stuff like inline CSS embedded through stylesheet_link_tag or just, you know, stylesheets.

Installation

Add this to your Gemfile:

gem 'awesomemailer'

Then bundle. And some chips. And a soda.

Example

Suppose you have the following mailer:

class UserMailer < ActionMailer::Base
  def signup(user_id)
    @user = User.find(user_id)
    mail(:to => @user.email, :from => "[email protected]")
  end
end

... and you have a template app/views/user_mailer/signup.html.erb. It might look something like this:

<html>
  <%= stylesheet_link_tag 'email' %>
  <body>
    <div id="header"><%= link_to raw(image_tag('logo.png')), root_url %></div>
    <div id="content">
      <p>Welcome to AwesomeMailer, <%= @user.name %>! We think you might be neat.</p>
    </div>
    <div id="footer">
      Copyright &copy 2013 <a href="http://www.delightfulwidgets.com">Delightful Widgets</a>
    </div>
  </body>
</html>

... and your style sheet (email.css) might be kinda like this:

body {
  background: #f0f0f0;
  font: 12pt Arial normal;
}

a img {
  border-width: 0;
}

#header {
  border-bottom: 1px solid black;
  margin-bottom: 1em;
}

#content {
  font-family: Helvetica;
  padding: 1em 0;
}

#content p {
  line-height: 1.3em;
}

#footer {
  border-top: 1px dotted orange;
  font-size: 10pt;
}

... you might be unhappy because most mail viewers couldn't care less that you included a stylesheet. But wait! There's AwesomeMailer! Just change your mailer to look like this:

class UserMailer < AwesomeMailer::Base

... and voila! Now your templates will render like this:

<html>
  <body style="background: #f0f0f0; font: 12pt Arial normal;">
    <div id="header" style="border-bottom: 1px solid black; margin-bottom: 1em;">
      <a href="http://www.delightfulwidgets.com/">
        <img src="http://www.delightfulwidgets.com/assets/logo.png" style="border-width: 0;" />
      </a>
    </div>
    <div id="content" style="font-family: Helvetica; padding: 1em 0;">
      <p style="line-height: 1.3em;">Welcome to AwesomeMailer, <%= @user.name %>! We think you might be neat.</p>
    </div>
    <div id="footer" style="border-top: 1px dotted orange; font-size: 10pt;">
      Copyright &copy 2012 <a href="http://www.delightfulwidgets.com">Delightful Widgets</a>
    </div>
  </body>
</html>

WOW!

Additional Features

@import

AwesomeMailer (or really, the library it relies on, CSS parser) is smart enough to load up stylesheets through @import statements. So go ahead and add @import url('global.css') to email.css, and we'll handle the rest.

Pseudo-classes

AwesomeMailer supports more than just inline styles. If you define pseudo-classes like :hover, :after, etc, it'll make sure they get included in a <style> tag in the <head> of your e-mail. Don't have a <head>? That's cool; AwesomeMailer will add one.

@font-face

AwesomeMailer will also load up font-face declarations, if'n you have 'em. That means you can add custom fonts to your e-mails the same way you do with your websites, and if your user's mail client supports them, UP they'll go!

Bugs

File bugs using the issues tab in Github. Don't e-mail me. Please.

LEGAL FUNSIES

It was built by Flip Sasser. CSS parsing is courtesy of (css_parser) by Alex Dunae. Thanks, b.