import * as nodemailer from 'nodemailer';
import MailerMail = require('nodemailer/lib/mailer');
import { Credentials } from 'nodemailer/lib/smtp-connection';
import { Options } from 'nodemailer/lib/xoauth2';
import { Mail } from '../Mail';
import { Office } from './Office';
export declare type GmailAuthOptions = Credentials | Options;
export declare enum GmailAuthType {
    login = "login",
    oauth2 = "oauth2"
}
export declare type GmailOfficeOptions = {
    authType: GmailAuthType;
    settings: GmailAuthOptions;
    mailer?: any;
} & ({
    authType: GmailAuthType.login;
    settings: Credentials;
} | {
    authType: GmailAuthType.oauth2;
    settings: Options;
});
export declare class GmailOffice extends Office {
    mailer: MailerMail;
    constructor(options: GmailOfficeOptions);
    send(mail: Mail): Promise<nodemailer.SentMessageInfo>;
}