Images in an email

An email cannot carry its images. What travels is HTML; every visual is fetched afterwards by the recipient's mail client, from a public URL. The media library is where those URLs come from. Upload once, reuse everywhere: the same image can sit in ten templates without being uploaded ten times.

What it accepts

jpg · png · gif · webp — 5 MB per file. Every media keeps its name, dimensions, weight, format and upload date, and exposes a public URL you can copy. Public means exactly that: reachable without signing in, because that is what a mail client does.

Inserting one

From the editor, the image picker inserts one media at a time and requires alternative text. That text is not paperwork: many clients block images by default, and a large share of readers see your alt text where you expected a picture. Screen readers read it too.
Size the image for the width you display it at. Mail clients do not resize gracefully, and a 4000 px banner shown at 600 px costs your reader the whole download for nothing.

What refuses

Anything that is not one of the four formats, and anything above 5 MB. Rejections are per file: the rest of a batch upload goes through.

The one irreversible thing

Deleting a media is permanent, and it reaches into the past: emails already sent that display it will show a broken image, in every inbox that opens them later. A sent email is not stored on your side — it points at your URL forever. If an image is wrong, upload the corrected version and use it in what comes next. Delete only what nothing ever sent.

What it implies elsewhere

Images are not covered by dark mode handling: a logo on a white background stays on white when the client inverts the page around it. A transparent PNG, or a version that reads on both grounds, is the fix.