Mail Attachements src are in cid format.

Question

I am facing an images issue in the mail body, the source of the image are in cid format which is not readable by the browser, how can I make them readable in the browser. Here are the attached screenshots.

Answer 1

cid means you have an inline attachment so the attachment source is a part of the message's MIMEContent and a browser won't render that by default. You could use something line MIMEKit to convert the raw Mime Message into something that the browser can render eg https://stackoverflow.com/questions/31417916/mimekit-mimemessage-to-browser-renderable-html.