Where do animated GIFs actually play in email? Here's the honest answer, plus what Gifmailer ships so your message looks intentional in every inbox — including Outlook.
Animated GIFs play natively across web and mobile. This is roughly 85% of consumer inboxes.
Freezes GIFs on frame 1. Gifmailer swaps in a static PNG via MSO conditional so it looks like a real photo, not a broken loop.
All modern Microsoft rendering engines play GIFs. Only the legacy Word-based Windows build is affected.
| Client | Animated GIF |
|---|---|
Gmail Web, iOS, Android | Animated Renders animated GIFs everywhere. Loops honored. |
Apple Mail macOS, iOS 15+ | Animated Native GIF playback in every version we test. |
Outlook.com Web | Animated Web app uses a modern rendering engine — animation plays. |
Outlook for Mac macOS (2016+) | Animated Mac build uses WebKit-based rendering; GIFs animate. |
Outlook Windows desktop (2007–2019) | First frame only Word rendering engine freezes GIFs on frame 1. Our MSO conditional swaps in a crisp PNG. |
Outlook Windows desktop (365 / New) | Animated The 'New Outlook' shipping since 2023 uses the web engine — GIFs animate. |
Yahoo Mail Web, iOS, Android | Animated Renders animated GIFs on all platforms. |
AOL Mail Web | Animated Same rendering engine as Yahoo — GIFs animate. |
Proton Mail Web, iOS, Android | Animated GIFs render inline; images may be proxied for privacy. |
Fastmail Web, iOS, Android | Animated Full animated GIF support. |
Thunderbird Desktop | Animated Gecko-based renderer plays GIFs by default. |
Samsung Mail Android | Animated Chromium-based; renders GIFs. |
Windows Mail Windows 10/11 default | Partial / version-dependent Uses EdgeHTML/WebView — animates in most builds; test on your target OS. |
GMX / Mail.com Web | Animated Renders animated GIFs. |
Outlook 2007 through 2019 on Windows renders HTML email with Microsoft Word, not a browser engine. Word can decode a GIF file but not animate it, so it paints frame 1 and stops. New Outlook (2023+), Outlook.com, and Outlook for Mac all use modern engines and animate normally.
Gifmailer generates a static PNG of the GIF's first frame alongside every render, and our copy-embed snippet wraps both in an MSO conditional comment:
<!--[if !mso]><!-->
<img src="https://gifmailer.com/api/public/gif/{id}.gif" ... />
<!--<![endif]-->
<!--[if mso]>
<img src="https://gifmailer.com/api/public/gif/{id}.png" ... />
<![endif]-->Legacy Outlook only reads the second branch and gets a crisp PNG. Every other client ignores the MSO tags and renders the animated GIF. You copy one snippet; both branches travel together.
Gifmailer renders the animation, the first-frame fallback, and the copy-paste HTML — so you don't have to think about Outlook again.
Support data based on ongoing tests across current client versions. Rendering can vary with future updates or user configuration (image-blocking, dark mode inversion, corporate policies).