Target using the [owa] Element

You can target by using a CSS element called [owa] (Outlook Web Access), which is part of

How does it work? prefixes all styles with their own. This means by placing the [owa] element before each class or id within your CSS, these will only be displayed in, all other webmail services, and email clients will ignore them.

To give it a go, simply place the following CSS within the of your email.


  <style type="text/css">
    [owa] .htmlemailcheck {
      color: #26d0ae;

Now you can place the following span tag where you want the contents to be shown in, that’s it!


  <span class="htmlemailcheck">
    This span will only be visible in

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