import { BaseAccount, MessengerClient } from "./MessengerClient";
import { Transporter } from "nodemailer";
import SMTPTransport from "nodemailer/lib/smtp-transport";
import { Attachment } from "../types";
export interface SMTPAccount extends BaseAccount<Transporter<SMTPTransport.SentMessageInfo>> {
    options: {
        /**
         * Default sender email address
         */
        defaultSender: string;
    };
}
export declare class SMTPClient extends MessengerClient<SMTPAccount> {
    constructor();
    /**
     * Sends an email using one of the registered accounts.
     *
     * @param accountName Account name
     * @param to Recipient email(s)
     * @param subject Email subject
     * @param html Email content
     * @param options.from Sender email
     */
    sendEmail(accountName: string, to: string[], subject: string, html: string, { attachments, from }?: {
        attachments?: Attachment[];
        from?: string;
    }): Promise<void>;
    /**
     * Adds an account to send email with.
     *
     * @param name Account name
     * @param host SMTP server host
     * @param port SMTP server port
     * @param user SMTP server username
     * @param pass SMTP server password
     * @param defaultSender Default sender email address
     */
    addAccount(name: string, host: string, port: number, user: string, pass: string, defaultSender: string): void;
    protected _createAccount(name: any, host: string, port: number, user: string, pass: string, defaultSender: string): SMTPAccount;
    private sendMessage;
}