export type MailSendResponse = {
    success: true;
    error?: never;
    repeatable?: never;
} | {
    success: false;
    error: string;
    repeatable: boolean;
};
export interface MailSender {
    disconnect: () => Promise<void>;
    send: (subject: string, content: string, to?: string[]) => Promise<MailSendResponse>;
}