import { ConfigService } from '@nestjs/config';
export declare class EmailService {
    private readonly configService;
    private transporter;
    private readonly logger;
    private readonly mailFromAddress;
    private readonly mailFromName;
    private readonly mailHost;
    private readonly mailPort;
    private readonly mailUser;
    private readonly mailPass;
    constructor(configService: ConfigService);
    sendSupportEmail(recipients: string[], subject: string, htmlContent: string, textContent?: string): Promise<boolean>;
}