import { type SendgridMailingConfig } from './providers/sendgrid-provider.js';
import { type EmailProvider, type EmailLogger, type EmailProviderName } from './types.js';
export interface MailingFactoryConfig {
    /**
     * Which provider to build. Currently: sendgrid | none.
     */
    provider: EmailProviderName;
    /**
     * SendGrid credentials and sender info. Required when provider = sendgrid.
     */
    sendgrid?: SendgridMailingConfig;
    /**
     * Optional logger for noop provider.
     */
    logger?: EmailLogger;
}
/**
 * Create a mailing provider instance from an explicit config object.
 * No environment reads happen here; caller must pass all needed values.
 */
export declare function createMailingProvider(config: MailingFactoryConfig): EmailProvider;
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