import { EmailConfig, EmailSendOptions, EmailService } from "./types";
/**
 * SMTP Email Service implementation using Nodemailer
 */
export declare class SMTPEmailService implements EmailService {
    private transporter;
    private config;
    private _initialized;
    constructor(config: EmailConfig);
    /**
     * Lazily initialize the SMTP transporter on first use
     */
    private ensureTransporter;
    /**
     * Check if the email service is properly configured
     */
    isConfigured(): boolean;
    /**
     * Send an email using SMTP or custom send function
     */
    send(options: EmailSendOptions): Promise<void>;
    /**
     * Verify SMTP connection (useful for startup checks)
     */
    verifyConnection(): Promise<boolean>;
}
/**
 * Create an email service from configuration
 */
export declare function createEmailService(config: EmailConfig): EmailService;