/**
 * SMTP Client Core Implementation
 * Main client class with delegation to handlers
 */
import { EventEmitter } from 'node:events';
import type { Email } from '../../core/classes.email.js';
import type { ISmtpClientOptions, ISmtpSendResult, IConnectionPoolStatus } from './interfaces.js';
import type { ConnectionManager } from './connection-manager.js';
import type { CommandHandler } from './command-handler.js';
import type { AuthHandler } from './auth-handler.js';
import type { TlsHandler } from './tls-handler.js';
import type { SmtpErrorHandler } from './error-handler.js';
interface ISmtpClientDependencies {
    options: ISmtpClientOptions;
    connectionManager: ConnectionManager;
    commandHandler: CommandHandler;
    authHandler: AuthHandler;
    tlsHandler: TlsHandler;
    errorHandler: SmtpErrorHandler;
}
export declare class SmtpClient extends EventEmitter {
    private options;
    private connectionManager;
    private commandHandler;
    private authHandler;
    private tlsHandler;
    private errorHandler;
    private isShuttingDown;
    constructor(dependencies: ISmtpClientDependencies);
    /**
     * Send an email
     */
    sendMail(email: Email): Promise<ISmtpSendResult>;
    /**
     * Test connection to SMTP server
     */
    verify(): Promise<boolean>;
    /**
     * Check if client is connected
     */
    isConnected(): boolean;
    /**
     * Get connection pool status
     */
    getPoolStatus(): IConnectionPoolStatus;
    /**
     * Update client options
     */
    updateOptions(newOptions: Partial<ISmtpClientOptions>): void;
    /**
     * Close all connections and shutdown client
     */
    close(): Promise<void>;
    private formatEmailData;
    private extractMessageId;
    private setupEventForwarding;
}
export {};