I sent html-mails via Mimemail and I want to include an image as attachment.
At the moment I include the image as
<img src="path-to-online-image"> in mimemail-message.tpl.php.
The Mails are sometimes classified as “Spam” and I think one reason could be the external loading of the image.
How can I include the image as “attachment” and link that image in mimemail-message.tpl.php?