Unable to attach signature to email, unable to add cid to attachment

I'm trying to send an email out, however, i was not able to attach the signautre base64 into the email as an images

When uploading the images as attachment, cid was not used to render the email with attachment

How to Embed Images in Your Emails (CID, Inline & More) | SendGrid.

Anyway we can label cid of the attachment so html body can render the 'attached' image?

Hey @zgfeedback!

It looks as though it's possible to set the CID for a file with SendGrid at the moment, but embedding images may not be supported. I've filed a request with the dev team for more support and can let you know here if it's added!