Skip to main content
Master CID Images — Inline images that skip blocks—learn implementation with examples. See How It Works →

What are CID images?

CID images are inline images referenced with a Content ID. They travel as attachments within the MIME structure.

They avoid remote blocking and appear reliably if the client supports inline rendering. They are the cargo stored safely in the ship’s hold.

Need personalized help?

Get a personalized explanation for your specific email setup. Open an AI assistant with your question pre-loaded — just add your details and send.