import EmailTemplate from './email-template';
import * as nodemailer from 'nodemailer';
import { Db } from 'mongodb';
import { Request } from 'express';
export default class Mailer {
    /** The settings used by this mailer. */
    private settings;
    /** A reference to the transport used to send the email */
    private transport;
    /** The database this mailer will pull configuration from. */
    private readonly db;
    /** The request this mailer will send emails for. */
    private readonly req;
    /** Create a nodemailer SMTP transport from the SMTP Transport settings */
    constructor(db: Db, req: Request);
    /**
     * Sends an email with an optional email template.
     * @param template the email template to use to generate the email contents.
     */
    send(options: nodemailer.SendMailOptions): Promise<MailerResult>;
    send(options: nodemailer.SendMailOptions, template: EmailTemplate, data: any): Promise<MailerResult>;
}
/** Contains the data from sending an email via SMTP. */
export interface MailerResult {
    /** The final message id. */
    messageId: string;
    /** The message envelope. */
    envelope: any;
    /** The addresses that accepted the message. */
    accepted: string[];
    /** The addresses that rejected the message. */
    rejected: string[];
    /** The last SMTP response. */
    response: string;
}