/**
 * Helper to generate a valid FormData object that matches what we see from
 * SendGrid's inbound parse webhook.
 *
 * See the raw-sendgrid-inbound-parse.txt file at the root of this project
 * for an example of the raw request body.
 */
export declare function createFormData({ attachments, from, html, subject, text, to, }: {
    attachments?: File[];
    from: string;
    html?: string;
    subject?: string;
    text?: string;
    to: string;
}): FormData;
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