/**
 * @module
 * SMTP-capable mailer factory — host/port config, pooling, and runtime adapters.
 *
 * Import from `sently/smtp` or use {@link createSMTPMailer} from the main package.
 * For HTTP transports, use `sently/mailer` instead (~10 KB smaller in app bundles).
 *
 * @example
 * ```ts
 * import { createSMTPMailer } from "sently/smtp";
 *
 * const mailer = await createSMTPMailer({
 *   host: "smtp.example.com",
 *   port: 587,
 *   auth: { user: "you@example.com", pass: "secret" },
 * });
 * ```
 */
import type { Mailer, SMTPMailerOptions } from "./core/types.js";
/**
 * Create a mailer from SMTP relay options (host, port, auth, pool, adapter).
 */
export declare function createSMTPMailer(options: SMTPMailerOptions): Promise<Mailer>;