I'm using the Mail application bundled with OS X 10.8. When switching from Mac OS X 10.6, I noticed that Mail now always includes a
text/html part, alongside the
text/plain part, in messages that include an image as attachment, even if the message's text has not been formatted in any way. Adding a different file type as attachment does not show that behavior.
The second problem is that the attached image is contained in the
text/html part and not the
text/plain part. Recipients whose mail clients (by configuration or by default) display the
text/plain part do not see the attached image, which is very annoying.
Is there a way to make Mail never include a
text/html part, by configuration or by using a specific method to insert the attachment?