I am trying to create an email from an HTML file with images in the email body. These images are not hosted online and so I want the images to be embedded in the email (the original source is local).
Encoding as a base64 string has not worked, and I have tried the solution from this thread How to embed an image into an Outlook HTML email message? with no luck either.
I also only care about the image displaying in outlook.
Help?
There are only 2 options for images in email, and you've mentioned both in your OP.
Assuming you want to keep hammering away at the Base64 embedded images technique, here are a few resources:
In the Campaign Monitor link there is a support chart - not sure if Outlook 2013 is unsupported all together, or if it just blocks the image like a linked hosted one, but either way it looks like there is no solution for automatically showing embedded images in Outlook 2013.