https://stackoverflow.com/questions/19571802
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If you look at the documents for litmus.com, they say:
The table below shows the mobile device and its operating system. We use the native mail application included for each mobile device.
BlackBerry 8900 (Plain Text Previews) BlackBerry OS 4
BlackBerry Curve (HTML Previews) BlackBerry OS 5
But, there are multiple versions of OS 4.x. If I remember correctly, HTML support was added in OS 4.5, and displaying HTML emails can be enabled/disabled by the individual user, or the BES administrator, as shown in this link. So, you do need to make sure HTML email is enabled.
There aren't that many devices left with OS < 4.5 at this point, so you'll have to decide whether you need to worry about them at all.
It might be a good idea to send out an HTML and plain text version of your emails, assuming you can control the email content. From litmus.com:
...a lot of BlackBerry devices in use today are actually showing the plain text version of the email. If no plain text version exists, the HTML code will be shown instead.
If you've used the HTML uploader within Litmus, you've nothing to worry about - we didn't ask you for the plain text version so we have nothing to show. If you've sent in an email you should be sure to include a plain text version as alternative part to your email, otherwise plain text email clients, such as BlackBerry's without HTML support, will show your HTML code.
See this answer for more recommendations on handling HTML email with BlackBerry.
