Add png to the body of the email, not the attachment

[wavic]

The email client should handle it.

However,... did you look at the link at the bottom of my second post here? If you click on it and go to the section "Inline Embedding (Base64) Encoding)" there are pros and cons of each method for embedded images. Look at them. Perhaps you can use a different method according to the user client. Is it a web service or some email client... I use web email service for example.