i'm trying to send a mail, in html, with an image. The only thing i managed to do it's to get the image in attachment file's list, with the error icon (image not found) in place of the image.
I use the example3, but i guess that is the cid generated that is bad, because it don't looks like any other cid. The mine is like this: "CID:email@example.com" (that is "some.random.numbers@localhost_name)
but normally, i think it should be something like this: "firstname.lastname@example.org" isn't it?