import type { Mailer } from './mailer.js';
import type { MailAddress, MailSendOptions, MailSendWithoutRenderingOptions, MailSendOptionsComplete, MailerDefaults } from './types.js';
export declare function convertAddress(address: MailAddress): string;
export declare function convertAddresses(addresses: MailAddress[]): string[];
export declare function extractDefaults(defaults: NonNullable<ConstructorParameters<typeof Mailer>[0]['defaults']>): MailerDefaults;
export declare function constructCompleteSendOptions(sendOptions: MailSendWithoutRenderingOptions<any, any> | MailSendOptions<any, any, any, any>, defaults: MailerDefaults): MailSendOptionsComplete;
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