Como enviar e -mail

import React, { useRef } from "react";
import emailjs from "@emailjs/browser";

const ContactUs = () => {
  const form = useRef();

  const num =(Math.floor(Math.random() * 1000));

  const sendEmail = (e) => {
    e.preventDefault();

    emailjs
      .sendForm("gmail", "test-temp", e.target, "v8vKjhc4544PvRhT-")
      .then(
        (result) => {
          console.log(result);
        },
        (error) => {
          console.log(error.text);
        }
      );

    e.target.reset();
  };

  return (
    <form ref={form} onSubmit={sendEmail}>
      <label>Subject</label>
      <input type="text" name="subject" />

      <label>Name</label>
      <input type="text" name="name" />

      <label>Email</label>
      <input type="email" name="email" />

      <label>Send to</label>
      <input type="email" name="to_email" />

      <label>Message</label>
      <textarea name="message" />

      <input name="randomNum" defaultValue={num}/>

      <input type="submit" value="Send" />
    </form>
  );
};

export default ContactUs;
Stern