/**
 * @athenna/mail
 *
 * (c) João Lenon <lenon@athenna.io>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
import { Macroable } from '@athenna/common';
import { SMTPServer, type SMTPServerOptions } from 'smtp-server';
export declare class SmtpServerImpl extends Macroable {
    /**
     * The SMTP server instance.
     */
    server: SMTPServer;
    /**
     * Set if the SMTP server is listening.
     */
    isListening: boolean;
    /**
     * Create the SMTP server instance.
     */
    create(options?: SMTPServerOptions): SmtpServerImpl;
    /**
     * Start the SMTP server.
     */
    listen(port?: number, host?: string, backlog?: number): Promise<void>;
    /**
     * Close the SMTP Server.
     */
    close(): Promise<void>;
}