Short answer:
If you see a blank box instead of images in Classic Outlook, the Show picture placeholders setting is enabled. Disable it to display images correctly.
Summary: If your email signature shows blank boxes where images should appear, Outlook is likely set to display picture placeholders. This feature is intended for slow connections, but prevents images from rendering.
If you see a blank box shaped like an image, Show picture placeholders is enabled.

Check your Picture Placeholder setting in Classic Outlook
- Click New Email.
- In the message window, go to File > Options.
- Select Mail, then click Editor Options.
- Go to Advanced and scroll down to find Show picture placeholders.
- Uncheck this option.
- Close the dialog and then close the message window.
Important: Do not send the email. Closing the message applies the setting globally.

Next steps
Create a new email to confirm that images now display correctly in your signature.
