nestjs-auth-email-phone/src/mail.service.ts

// mail.service.ts
import { Injectable } from '@nestjs/common';
import * as nodemailer from 'nodemailer';

@Injectable()
export class MailService {
  private transporter = nodemailer.createTransport({
    host: process.env.SMTP_HOST,
    port: Number(process.env.SMTP_PORT),
    secure: true,
    auth: {
      user: process.env.SMTP_USER,
      pass: process.env.SMTP_PASS
    }
  });

  async sendOtp(email: string, otp: string) {
    await this.transporter.sendMail({
      from: '"Your App" <[email protected]>',
      to: email,
      subject: 'Your OTP Code',
      text: `Your verification code is ${otp}. It expires in 5 minutes.`
    });
  }
}