import { Mailable } from '../Mailable.mjs';
import { MailerProvider } from '../MailerProvider.mjs';

/**
 * Configuration options for the PostmarkProvider.
 */
type PostmarkProviderConfig = {
    /** Postmark server token */
    server_token: string;
    /** Default sender email address */
    default_from: string;
};
/**
 * Mailer provider that sends emails via Postmark API.
 * Supports server token from configuration or POSTMARK_SERVER_TOKEN environment variable.
 */
declare class PostmarkProvider implements MailerProvider {
    private defaultFrom;
    private serverToken;
    /**
     * Creates a new PostmarkProvider instance.
     * @param options - Provider configuration options
     */
    constructor(options?: Partial<PostmarkProviderConfig>);
    /**
     * Sets the default sender email address.
     * @param from - The default sender email address
     */
    setDefaultFrom(from: string): void;
    /**
     * Sends an email via Postmark API.
     * @param mail - The email message to send
     * @throws Error if the Postmark API request fails
     */
    sendMail(mail: Mailable): Promise<void>;
}

export { PostmarkProvider, type PostmarkProviderConfig };