In the email result, embedded images that are stored as links are empty. Is there a function to see the images which are as links in the mail, also in the output.
External links inside HTML email (<a src="http://example.com/a.jpg">") are not part of the email. Mail.dll doesn't give you a list of those.
Elements linked with cid protocol (<a src="cid:a1234@example.com">) are available in IMail.Visuals collection: https://www.limilabs.com/blog/sending-email-with-embedded-image