When all you need is a really simple HTML email template.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name="viewport" content="width=device-width" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Really Simple HTML Email Template</title>
<style>
/* ------------------------------------- 
		GLOBAL 
------------------------------------- */
* { 
	margin:0;
	padding:0;
	font-family: "Helvetica Neue", "Helvetica", Helvetica, Arial, sans-serif; 
	font-size: 100%;
	line-height: 1.6;
}

img { 
	max-width: 100%; 
}

body {
	-webkit-font-smoothing:antialiased; 
	-webkit-text-size-adjust:none; 
	width: 100%!important; 
	height: 100%;
}


/* ------------------------------------- 
		ELEMENTS 
------------------------------------- */
a { 
	color: #348eda;
}

.btn-primary{
	text-decoration:none;
	color: #FFF;
	background-color: #348eda;
	border:solid #348eda;
	border-width:10px 20px;
	line-height:2;
	font-weight:bold;
	margin-right:10px;
	text-align:center;
	cursor:pointer;
	display: inline-block;
	border-radius: 25px;
}

.btn-secondary {
	text-decoration:none;
	color: #FFF;
	background-color: #aaa;
	border:solid #aaa;
	border-width:10px 20px;
	line-height:2;
	font-weight:bold;
	margin-right:10px;
	text-align:center;
	cursor:pointer;
	display: inline-block;
	border-radius: 25px;
}

.last { 
	margin-bottom: 0;
}

.first{
	margin-top: 0;
}

.padding{
	padding:10px 0;
}


/* ------------------------------------- 
		BODY 
------------------------------------- */
table.body-wrap { 
	width: 100%;
	padding: 20px;
}

table.body-wrap .container{
	border: 1px solid #f0f0f0;
}


/* ------------------------------------- 
		FOOTER 
------------------------------------- */
table.footer-wrap { 
	width: 100%;	
	clear:both!important;
}

.footer-wrap .container p {
	font-size:12px;
	color:#666;
	
}

table.footer-wrap a{
	color: #999;
}


/* ------------------------------------- 
		TYPOGRAPHY 
------------------------------------- */
h1,h2,h3{
	font-family: "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; line-height: 1.1; margin-bottom:15px; color:#000;
	margin: 40px 0 10px;
	line-height: 1.2;
	font-weight:200; 
}

h1 {
	font-size: 36px;
}
h2 {
	font-size: 28px;
}
h3 {
	font-size: 22px;
}

p, ul, ol { 
	margin-bottom: 10px; 
	font-weight: normal; 
	font-size:14px;
}

ul li, ol li {
	margin-left:5px;
	list-style-position: inside;
}

/* --------------------------------------------------- 
		RESPONSIVENESS
		Nuke it from orbit. It's the only way to be sure. 
------------------------------------------------------ */

/* Set a max-width, and make it display as block so it will automatically stretch to that width, but will also shrink down on a phone or something */
.container {
	display:block!important;
	max-width:600px!important;
	margin:0 auto!important; /* makes it centered */
	clear:both!important;
}

/* Set the padding on the td rather than the div for Outlook compatibility */
.body-wrap .container{
	padding:20px;
}

/* This should also be a block element, so that it will fill 100% of the .container */
.content {
	max-width:600px;
	margin:0 auto;
	display:block; 
}

/* Let's make sure tables in the content area are 100% wide */
.content table { 
	width: 100%; 
}

</style>
</head>
 
<body bgcolor="#f6f6f6">

<!-- body -->
<table class="body-wrap">
	<tr>
		<td></td>
		<td class="container" bgcolor="#FFFFFF">

			<!-- content -->
			<div class="content">
			<table>
				<tr>
					<td>
						<p>Hi there,</p>
						<p>Sometimes all you want is to send a simple HTML email with a basic design.</p>
						<h1>Really simple HTML email template</h1>
						<p>This is a really simple email template. It's sole purpose is to get you to click the button below.</p>
						<h2>How do I use it?</h2>
						<p>All the information you need is on GitHub.</p>
						<table>
							<tr>
								<td class="padding">
									<p><a href="https://github.com/leemunroe/html-email-template" class="btn-primary">View the source and instructions on GitHub</a></p>
								</td>
							</tr>
						</table>
						<p>Feel free to use, copy, modify this email template as you wish.</p>
						<p>Thanks, have a lovely day.</p>
						<p><a href="http://twitter.com/leemunroe">Follow @leemunroe on Twitter</a>
					</td>
				</tr>
			</table>
			</div>
			<!-- /content -->
									
		</td>
		<td></td>
	</tr>
</table>
<!-- /body -->

<!-- footer -->
<table class="footer-wrap">
	<tr>
		<td></td>
		<td class="container">
			
			<!-- content -->
			<div class="content">
				<table>
					<tr>
						<td align="center">
							<p>Don't like these annoying emails? <a href="#"><unsubscribe>Unsubscribe</unsubscribe></a>.
							</p>
						</td>
					</tr>
				</table>
			</div>
			<!-- /content -->
				
		</td>
		<td></td>
	</tr>
</table>
<!-- /footer -->

</body>
</html>