New Outlook vs Classic Outlook: Email Signature Differences Explained

If you've recently updated Windows or Outlook, you may have noticed a toggle switch offering to try the "New Outlook." Microsoft is gradually replacing the classic Outlook desktop application with a web-based version that syncs across all your devices. While this brings many benefits, it also changes how email signatures work.

This guide explains the key differences between New Outlook and Classic Outlook email signatures, shows you how to set up signatures in both versions, and helps you troubleshoot common issues.

How to Tell Which Version You're Using

Not sure which Outlook you have? Here's how to check:

New Outlook Indicators:

• Toggle switch in the top-right corner labeled "New Outlook"
• Simplified ribbon with fewer options
• Settings accessed via gear icon (not File menu)
• Looks similar to Outlook on the web

Classic Outlook Indicators:

• Traditional File, Home, Send/Receive ribbon tabs
• Settings via File > Options
• More feature-rich interface
• Separate window for calendar, contacts, etc.

Key Differences at a Glance

Setting Up Signatures in New Outlook

The New Outlook stores signatures in the cloud, which means they sync across all your devices automatically. Here's how to set one up:

1. Click the Settings gear icon in the top-right corner
2. Select Accounts from the left sidebar
3. Click Signatures
4. Click + New signature and give it a name
5. Use the editor to create your signature or paste your HTML
6. Set default signatures for new messages and replies
7. Click Save

Setting Up Signatures in Classic Outlook

Classic Outlook offers more robust signature support with full HTML capabilities:

1. Go to File > Options
2. Select Mail from the left sidebar
3. Click the Signatures... button
4. Click New to create a signature
5. Give it a name and click OK
6. Create your signature in the editor or paste HTML
7. Choose default signatures for new messages and replies
8. Click OK to save

Pros and Cons of Each Version

New Outlook

Classic Outlook

Troubleshooting Common Issues

Signature Not Appearing

• Check that you've set a default signature for new messages
• Verify you're using the correct email account
• In New Outlook, ensure your signature is saved to the cloud
• Try closing and reopening Outlook

Images Not Displaying

• In New Outlook, images must be hosted online (not embedded)
• Check that image URLs are using HTTPS
• Verify the image host allows external access
• Keep images under 50KB for best compatibility

Formatting Looks Wrong

• New Outlook strips some HTML - simplify your design
• Avoid complex tables in New Outlook
• Use web-safe fonts only
• Test your signature by sending to yourself

Should You Switch to New Outlook?

Microsoft is slowly making New Outlook the default, but you can still switch back to Classic Outlook using the toggle. Here's our recommendation:

• Use New Outlook if: You want signatures to sync across devices and your signature is relatively simple
• Stick with Classic Outlook if: You need complex HTML signatures or work offline frequently

The good news is that signatures created with SigGen work in both versions. Our templates are designed with broad compatibility in mind, though you may see slight formatting differences between the two Outlook versions.