Outlook

Effortless Email Signatures for Microsoft Outlook

Whether your team uses Outlook desktop, Outlook on the web, or Outlook mobile, Siggly ensures every email goes out with a consistent, professional signature. Deploy through transport rules, registry policies, or our native integration.

400M+

Outlook users worldwide

3 min

Average deployment time

100%

Outlook version compatibility

How Siggly Works with Outlook

Transport Rule Deployment

Append signatures server-side using Exchange transport rules. Every outgoing email gets the correct signature regardless of which Outlook client the user opens.

Registry & Group Policy

Push signature files to Windows desktops through Group Policy or registry settings for organizations that prefer client-side deployment.

Outlook on the Web Support

Siggly deploys signatures to Outlook on the web (OWA) through the Microsoft 365 admin API, covering browser-based users seamlessly.

Outlook Mobile Compatibility

Signatures render correctly on Outlook for iOS and Android. Combine with Intune policies for managed device deployment.

COM Add-In Option

For organizations requiring client-side signature insertion with dynamic content, Siggly supports COM add-in deployment on Outlook desktop.

Deploying Signatures to Outlook

Connect Microsoft 365

Authenticate your Microsoft 365 tenant and grant Siggly the necessary permissions to manage signatures on behalf of your users.

Design Your Template

Use the visual editor to create an Outlook-optimized signature with proper table layouts, VML backgrounds, and conditional comments for rendering consistency.

Choose a Deployment Method

Select server-side transport rules for universal coverage, client-side registry deployment for Outlook desktop, or both for maximum compatibility.

Monitor and Update

Track signature performance in the analytics dashboard and push updates to all users instantly when your design or branding changes.

Outlook Signature Best Practices

Use table-based layouts for consistent rendering across Outlook versions

Avoid CSS floats and flexbox — Outlook uses the Word rendering engine

Include VML markup for background images in Outlook desktop

Keep total signature width under 600px for optimal display

Test signatures in Outlook 2016, 2019, 2021, and the new Outlook

Set up transport rules to cover new replies and forwards

"Deploying signatures across 2,000 Outlook users used to take our IT team a full week. With Siggly and transport rules, it takes five minutes and zero helpdesk tickets."

Michael Grant

IT Infrastructure Lead, Harmon Financial Group

Frequently Asked Questions

Does Siggly work with the new Outlook for Windows?

Yes. Siggly supports the classic Outlook desktop client, the new Outlook for Windows, Outlook on the web, and Outlook mobile apps on iOS and Android.

Can I use transport rules and client-side deployment together?

Absolutely. Many organizations use transport rules as a fallback to ensure every email has a signature, while client-side deployment gives users a preview in their compose window.

Will signatures appear in replies and forwards?

With server-side transport rules, signatures are appended to all outgoing messages including replies and forwards. Client-side deployment depends on Outlook settings.

How do I handle shared mailboxes?

Siggly can assign specific signature templates to shared mailboxes. Transport rules apply based on the sending address, so shared mailbox emails get the correct signature automatically.

What about Outlook on Mac?

Outlook for Mac supports HTML signatures through the preferences panel. Siggly generates Mac-compatible signature files and can deploy them through Microsoft 365 admin APIs.

Deploy Outlook Signatures in Minutes

Connect your Microsoft 365 tenant and push branded signatures to every Outlook user today. Start free.