import { IGateway } from '../interfaces';
import { Attachment, Content, SmtpAttachment, SmtpOptions } from '../types';
export declare class SmtpGateway implements IGateway {
    private readonly smtpOptions;
    private readonly logger;
    private readonly transporter;
    constructor(smtpOptions: SmtpOptions);
    send(to: string, content: Content): Promise<void>;
    prepareAttachments(attachments: Attachment[]): SmtpAttachment[];
}