The folks at Campaign Monitor tested the support for animated gifs in all email clients and found that all but Outlook 2007 support them. "Outlook 2007 displays the first frame of the GIF as a static image. So if your first frame works as a static image, you are in good shape", says Mark Wyner.
Mark also provides some helpful tips regarding the use of animated gifs:
- If you use animated images to tell a story, ensure everyone gets the message. Consider those with low or no visibility, slow connections and those who pay per kilobyte on their mobile devices.
- Blinking, strobing or streaking text or graphics sucked in 1999 and they suck now, too. Leave the annoying animations behind.
- Just because you can, doesn’t mean you should.
- Be creative. Just as any tool in web design, we can use animated GIFs to enhance our message in non-invasive ways.
Source: Campaign Monitor