import { SentMessageInfo } from 'nodemailer';
import MailerMail = require('nodemailer/lib/mailer');
import { Mail } from '../Mail';
import { FcmMailer, FcmOfficeOptions } from './FcmOffice';
import { GmailOfficeOptions } from './GmailOffice';
import { OnesignalMailer, OnesignalOfficeOptions } from './OnesignalOffice';
import { SendgridMailer, SendgridOfficeOptions } from './SendgridOffice';
export declare type Mailer = MailerMail | FcmMailer | SendgridMailer | OnesignalMailer;
export declare type OfficeResult = SentMessageInfo;
export declare type OfficeOptions = GmailOfficeOptions | FcmOfficeOptions | SendgridOfficeOptions | OnesignalOfficeOptions;
export declare abstract class Office {
    mailer: Mailer;
    protected constructor(mailer: Mailer);
    abstract send(mail: Mail): Promise<OfficeResult>;
}