smtp.ts

import { SmtpClient } from "https://deno.land/x/smtp/mod.ts";

const client = new SmtpClient();

await client.connect({
  host: "smtp.163.com",
  port: 25,
  username: "username",
  password: "password",
});

await client.send({
  from: "[email protected]",
  to: "[email protected]",
  subject: "Mail Title",
  content: "Mail Content，maybe HTML",
});

await client.close();