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    copied!<p>Assuming you know how to send normal plain-text emails from Rails using ActionMailer, to get <code>HTML</code> emails working you need to set a content type for your email.</p> <p>For example, your notifer might look like this:</p> <pre><code>class MyMailer &lt; ActionMailer::Base def signup_notification(recipient) recipients recipient.email_address_with_name subject "New account information" from "system@example.com" body :user =&gt; recipient content_type "text/html" end end </code></pre> <p>Note the <code>content_type "text/html"</code> line. This tells ActionMailer to send an email with a content type of <code>text/html</code> instead of the default <code>text/plain</code>.</p> <p>Next you have to make your mailer views output <code>HTML</code>. For example, your view file <code>app/views/my_mailer/signup_notification.html.erb</code> might look like the following:</p> <pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"&gt; &lt;html lang="en"&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8"&gt; &lt;style type="text/css" media="screen"&gt; h3 { color: #f00; } ul { list-style: none; } &lt;/style&gt; &lt;/head&gt; &lt;body&gt; &lt;h3&gt;Your account signup details are below&lt;/h3&gt; &lt;ul&gt; &lt;li&gt;Name: &lt;%= @user.name %&gt;&lt;/li&gt; &lt;li&gt;Login: &lt;%= @user.login %&gt;&lt;/li&gt; &lt;li&gt;E-mail: &lt;%= @user.email_address %&gt;&lt;/li&gt; &lt;/ul&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>As you can see the <code>HTML</code> view can include a <code>&lt;style&gt;</code> tag to define basic styles. Not all <code>HTML</code> and <code>CSS</code> is supported, especially across all mail clients, but you should definitely have sufficient formatting control over text styles.</p> <p>Embedding images is a bit tricker if you plan to display attached emails. If you are simply including emails from external sites, you can use an <code>&lt;img /&gt;</code> tag as you usually would in <code>HTML</code>. However, many mail clients will block these images from being displayed until the user authorises it. If you need to display attached images, the Rails plug-in <a href="http://rubyforge.org/frs/?group_id=4569" rel="noreferrer">Inline Attachments</a> might be worth a look.</p> <p>For more information on Rails mailing support, the <a href="http://api.rubyonrails.org/classes/ActionMailer/Base.html" rel="noreferrer">ActionMailer documentation</a> is a great resource</p>
 

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