To create an email signature, your must first make sure your messages are composed in HTML format by default. You can then use the signatures feature to create a signature.

The post shows how to edit the default signature in the Outlook (new) App for Windows 11/10 and some other options provided in the new Outlook app Settings..

If the Mail app of Windows is displaying its emails in raw HTML data or code instead of the regular readable format, follow these solutions to resolve the issue.

WIndows 10's Mail app includes a "sent from Windows 10 Mail" signature by default. Here's how to change that or remove it.