export interface Config {
    from: string;
    html: string;
    sendgrid_api_key: string;
    subject: string;
    to: string | string[];
}
export interface Options {
    /**
     * https://docs.sendgrid.com/for-developers/sending-email/personalizations
     */
    template_id?: string;
}
export interface SuccessResponse {
    message: string;
    sendgrid_message_id: string;
}
/**
 * Send an email to one or more recipients, using the SendGrid API.
 *
 * https://docs.sendgrid.com/api-reference/mail-send/mail-send#body
 */
export declare const send: ({ from, html, sendgrid_api_key, subject, to }: Config, options?: Options) => Promise<SuccessResponse>;
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