Embedded images

Attachments can be used as embedded images in the HTML body. To use this feature, you need to set additional property of the attachment - cid (unique identifier of the file) which is a reference to the attachment file. The same cid value must be used as the image URL in HTML (using cid: as the URL protocol, see example below).

**NB!** the cid value should be as unique as possible!


let message = {
    html: 'Embedded image: <img src="cid:unique@nodemailer.com"/>',
    attachments: [{
        filename: 'image.png',
        path: '/path/to/file',
        cid: 'unique@nodemailer.com' //same cid value as in the html img src