Full animation renders inline.
Crisp PNG rendered where the GIF would have frozen anyway.
No broken image icon. No pixelated first frame. On-brand.
One snippet handles both
Copy the Outlook-safe HTML from any generated GIF. It uses <!--[if mso]> conditional comments — a Microsoft-only syntax that every other client ignores.
<!--[if !mso]><!-->
<a href="https://your-link.com" style="text-decoration:none">
<img src="https://gifmailer.com/api/public/gif/abc123.gif"
alt="Animated message" width="600"
style="display:block;width:100%;max-width:600px;height:auto;border:0" />
</a>
<!--<![endif]-->
<!--[if mso]>
<a href="https://your-link.com" style="text-decoration:none">
<img src="https://gifmailer.com/api/public/gif/abc123.png"
alt="Animated message" width="600"
style="display:block;width:100%;max-width:600px;height:auto;border:0" />
</a>
<![endif]-->Why this matters
~7% of B2B recipients
Roughly 7% of business email opens still happen in Outlook desktop (Litmus 2024). A frozen mid-frame kills the message for them.
First-frame is designed
Gifmailer captures frame 1 as a real PNG — you can even override it with a hand-picked cover image. No accidental blurry stills.
Zero deliverability hit
MSO conditional comments are ignored by spam filters and universally supported by ESPs. Same email, same headers, no penalty.
FAQ
Does Outlook 365 / new Outlook animate GIFs?+
Outlook.com, Outlook for Mac, Outlook Mobile, and the new Outlook for Windows all animate GIFs normally. Only Outlook 2007–2019 desktop for Windows — which still uses the Word engine — freezes them.
Can I customize the fallback image?+
Yes. By default we use frame 1 of the GIF. You can override with any PNG or JPG in the GIF editor.
Will this affect deliverability?+
No. MSO conditional comments are inert markup — they don't trip spam scoring. Every major ESP (Mailchimp, HubSpot, Klaviyo, Customer.io) supports pasting the snippet as-is.
Do I need to host the PNG anywhere?+
No. Gifmailer serves both /abc123.gif and /abc123.png from the same public URL — the fallback is generated automatically.
See the full email client compatibility matrix, or read our guide to sending animated GIFs in Outlook.
Stop worrying about Outlook.
One snippet from Gifmailer covers every mainstream email client. Try free — 30 credits included.