When you receive an e-mail message that contains animated graphics, such as animated .gif files, only a static image appears.
By default, Outlook doesn't play animated graphics in the body of email messages. Only the first frame of the animation appears.
You can enable animated GIFs in Outlook by doing one of the following:
In Outlook for Office 365 before version 2008, select File > Options > Advanced. In the Display section, check the box to Play animated GIFs.
If you have Outlook for Office 365, version 2008 or higher, use Windows 10 to enable animated GIFs.
Click Start and type Show animations. Click the search result and under Simplify and personalize Windows, enable Show animations in Windows.
You can also view the email message in your browser.
View an e-mail message in your Web browser (Outlook 2016, Outlook 2013, and Outlook 2010)
Open the message.
On the Message tab, in the Move group, click Actions, and then click View in Browser.