/**
 * This file is part of the @egodigital/egoose distribution.
 * Copyright (c) e.GO Digital GmbH, Aachen, Germany (https://www.e-go-digital.com/)
 *
 * @egodigital/egoose is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, version 3.
 *
 * @egodigital/egoose is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
/**
 * List of mail formats.
 */
export declare enum MailFormat {
    /**
     * Plain text.
     */
    PlainText = 0,
    /**
     * Rich text HTML
     */
    HTML = 1
}
/**
 * Options for 'sendMail()' function.
 */
export interface SendMailOptions {
    /**
     * The body.
     */
    body: any;
    /**
     * The format.
     */
    format?: MailFormat;
    /**
     * The subject.
     */
    subject?: string;
    /**
     * The address, where to send the mail to.
     */
    to: string;
}
/**
 * Sends an email.
 *
 * @param {SendMailOptions} opts Options.
 */
export declare function sendMail(opts: SendMailOptions): Promise<void>;