import { IAuthentication } from '../interfaces/Authentication.js';
import { ILogger } from '../interfaces/Logger.js';
interface ISMTPAuthOptions {
    host: string;
    port?: number;
    useSecureTransport?: boolean;
    validHosts?: string[];
}
export declare class SMTPAuth implements IAuthentication {
    private host;
    private port;
    private useSecureTransport;
    private validHosts?;
    private logger;
    constructor(options: ISMTPAuthOptions, logger: ILogger);
    authenticate(username: string, password: string): Promise<boolean>;
}
export {};