How to embed an image in email body when data URI method does not work using Power Automate

Base64 Data URI images are blocked by most email clients, especially Outlook, for security reasons. A reliable alternative is the Content-ID (CID) method in Power Automate, which attaches the image file and references it inline via a cid: tag in the HTML body. The guide walks through creating a flow, retrieving an image from SharePoint or OneDrive, constructing the img tag with a Content-ID, and sending the email via an HTTP action.