Coding HTML email templates is complicated. Coding templates for Outlook gets even more complicated since Outlook rendering issues are incredibly common. Outlook 2000, 2002, 2003, 2007, 2010, 2013, 2016,, Outlook for Office 365, Outlook for iOS, Outlook for Android… the list won’t stop there, there will be more in years to come.

And they all use different rendering engines. Some use Webkit. Some use IE. Some use Microsoft Word. On top of those rendering engines they each add their own flavor of rendering, classes and security policies. And some support media queries for responsive design, most don’t.

Some good news. As an Outlook user, you’re part of a network of more than 400 million active users around the world using what’s probably the best corporate email client. Another good news is that modern tools today allow you to send personalized employee emails using your Outlook distribution lists.

Send Responsive Emails From Outlook


The bad news is that when it comes down to sending beautiful, responsive emails, more often than not Outlook will take the templates you worked super hard on and render them incorrectly with broken links, missing pictures and misaligned text. You think you’ve done a great job until the replies start pouring in: “Re: broken link”, “picture missing?” are probably among the subject lines.

The first thing to remember is that, in short, Outlook doesn’t really do responsive emailing. What this means is that, in order for your emails to be rendered properly both on desktop and on mobile, you need to create email templates that work for both, rendering your content properly regardless of the size of the screen.

How do we accomplish this? Here are our tips!

6 Tips to Eliminate Outlook Rendering Issues

1) Use ContactMonkey’s Drag-and-Drop Email Template Builder 

The easiest way to get your emails to render properly in Outlook is to use ContactMonkey’s email template builder. Our plugin integrates with your Outlook and allows you to create, send, track and measure responsive, HTML emails from your Outlook inbox.

We’ve engineered a solution to work with Outlook to make sure your emails always render perfectly. When you use ContactMonkey in Outlook, your emails will look exactly how you designed them.

Get setup with ContactMonkey. Once set up, here are the easy steps to eliminate rendering issues. 

  • Launch your email template builder from Outlook 

Hit “Design HTML” and get started

  • Create your template using our drag-and-drop builder


  • Preview both of desktop and mobile

  • Once you’re happy, import back to Outlook and send! 


If you’re not using ContactMonkey yet to eliminate Outlook rendering issues, here are some best practices guidelines to ensure your responsive design look exactly how you envision them.

2) Stick to table-based layouts

Let’s get this out of the way. Email development is not like modern web development. Years ago in web development, we accepted that using tables to markup your layouts and content was not best practice. However, in the email world, it is still good practice, especially if supporting Outlook.

Various Outlook versions don’t support the box model. So to ensure your layout looks as expected, we don’t use divs and floats, we have to use tables, table rows and table cells. This ensures your layout and structure stays intact.

Since Outlook embraces simplicity, this is not the time to be building templates using multiple divs and floats. Instead, embracing tables is the most reliable way to get predictable rendering in Outlook. As our friends over at put it:

“When using align=”left”, tables will stack on top of each other on smaller screens. This technique is the basis of responsive and fluid design. It works like this: You have two tables that are each 300px wide with align=”left” inside the same container. If the screen is 600 or more pixels wide (as it would be for most desktop clients) then the tables will appear side by side. If the screen is only 400px wide, then the two tables will stack on top of each other. Nested tables are totally safe, so feel free to nest away.”

Here’s an example — feel free to play around with the window size to see how the tables respond.

Learn to Eliminate Outlook Rendering Issues


3) Bulletproof  Your Images

When it comes to sending out images, whether a client will block your images or not can feel like a game of Russian Roulette. For that reason, it’s extremely important to include descriptive alt text for your images so your audience still get the information you tried to convey with your pictures.

In the example below from Campaign Monitor you can see how alt text still gets your point across even if images don’t load.

Outlook rendering issues

For high resolution (retina) screens you want to make use of 2x or 3x images. To ensure that these images don’t break out of your layouts we need to set the height and width attributes i.e. if your image is displayed at 600px wide in the email then you want to save this image as 1200px wide so it is high resolution and set the width attribute to 600px.

Send Responsive Emails From Outlook Painlessly


Here’s an example of how your image HTML should look:


<img src=”” alt=”Descriptive text” width=”600px” height=”300px” border=”0” style=”display:block; max-width: 100%;”>

Note that Outlook 2013 requires you add this code to the <head> of your email to fix DPI scaling issues.


<!–[if gte mso 9]>









4) Stick to 600px Width

The trick to creating “responsive” emails that don’t cause Outlook rendering issues is to make sure your template works in the lowest common denominator. In width terms that means that you want to stick to 550-600px so your email is displayed properly in small screens while still giving you plenty of room to play with your content.

You can target specific Outlook clients and versions with conditional statements. So if you want to apply certain classes or widths that introduce different styles or “fixes” for those versions you can.


<!–[if gte mso 9]>

   <table width=”550px”>



This particular 550px width above would only apply to “gte mso 9” which means “greater than or equal to Microsoft Office 9” which would actually target Outlook 2000 and above.

Outlook rendering issues

5) Use Email-safe Fonts

We know that the designer in you wants to use that custom font you feel embodies the brand but not all email clients can display different types of fonts.

Using an email safe font stack will ensure that all your subscribers or employees, regardless of their browser or email client of choice will see the same font.

The most common email-safe fonts are Arial, Helvetica, Tahoma, Lucida, Verdana, Times, and Trebuchet.

6) Inline CSS

While various modern email clients have started to support embedded CSS, most Outlook versions do not. If you link to an external stylesheet, or embed your CSS in the head of your document, you’ll often find that no styles get rendered. They’re simply ignored.

That’s why we inline our CSS. We write the styles inline with the HTML elements. Doing this manually can take up a lot of time which is where CSS inliners come in handy to automate that task for you.

For example, a piece of content in your email might look like this:

<table border=”0″ cellpadding=”0″ cellspacing=”0″ align=”center”><tr><td style=”font-family: Helvetica, sans-serif; font-size: 14px; vertical-align: top; font-weight: normal; padding-bottom: 8px;” valign=”top”>Hello world</td></tr></table>

A combination of HTML tables and inlined CSS ensures your templates are solid and that no Outlook rendering issues get in the way.

Get Email Template Builder in Outlook, request your demo now and we will get you set up on your Free Email Template Builder Trial!


Emails in Outlook are tricky, so even after sticking to the best practices and tips mentioned above, it goes without saying you need to test your email templates to make sure that nothing breaks. Some tools where you can test your templates:

Other helpful resources:

Any other tips for getting rid of Outlook rendering issues? Sending responsive or HTML emails to Outlook can be a nightmare but following the tips above or using our Email Template Builder for sending responsive HTML emails from Outlook should make your life a little easier. Have you found anything else that works? Please tweet at us with any other tips.

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