import type { Renderer } from "./_middleware.mjs";
/** MJML adapter. Accepts a `mjml:` string on `email.send()`.
*
*  Uses the optional peer `mjml` (or `mjml-browser` in the browser).
*  Compiled output goes into `msg.html`. */
export interface MjmlRenderOptions {
	/** Override the compiler for tests. */
	compile?: (source: string) => Promise<string> | string;
	/** Validation level forwarded to mjml. Default: "soft". */
	validationLevel?: "strict" | "soft" | "skip";
}
export declare function mjmlRenderer(options?: MjmlRenderOptions): Renderer;
export default mjmlRenderer;