MHT support for Outlook "view it in a web browser"
When viewing an email, Outlook sometimes displays an alert "If there are problems with how this message is displayed, click here to view it in a web browser". Clicking the alert will open the email in Internet Explorer, even if another browser is selected as the default. Copying the URL from Internet Explorer into the new Edge address bar will display the raw HTML, but will not render the page. file:///C:/Users/mseit/AppData/Local/Microsoft/Windows/INetCache/Content.Outlook/3HAGQHC9/email.mht