Bring your own HTML

The editor has two modes. The drag-and-drop builder generates bulletproof HTML for you. HTML mode is a Monaco editor with live preview for people who already write email HTML.

Paste your HTML or write MJML and Mule Mail compiles it. The live preview has a desktop and mobile toggle. Required merge tags are still validated on save, so you cannot ship a template missing an unsubscribe link.

Inline your CSS. Email clients strip <style> blocks unpredictably; Mule Mail inlines on compile but hand-written HTML should not depend on it.