/**
 * SMTP client implementation.
 *
 * Uses the native SMTP plugin type from @superblocksteam/types.
 * Sends emails with support for CC, BCC, reply-to, and attachments.
 */
import type { QueryExecutor, TraceMetadata } from "../registry.js";
import type { IntegrationConfig, IntegrationClientImpl } from "../types.js";
import type { SmtpClient, SmtpSendOptions } from "./types.js";
/**
 * Internal implementation of SmtpClient.
 *
 * Constructs SMTP plugin requests matching the proto schema
 * and executes them via the orchestrator.
 */
export declare class SmtpClientImpl implements SmtpClient, IntegrationClientImpl {
    readonly config: IntegrationConfig;
    private readonly executeQuery;
    constructor(config: IntegrationConfig, executeQuery: QueryExecutor);
    get name(): string;
    get pluginId(): string;
    send(options: SmtpSendOptions, metadata?: TraceMetadata): Promise<unknown>;
}
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