import nodemailer from "nodemailer"; // see https://support.sendgrid.kke.co.jp/hc/ja/articles/204187885-SMTP%E3%81%AE%E6%8E%A5%E7%B6%9A%E6%83%85%E5%A0%B1%E3%82%92%E6%95%99%E3%81%88%E3%81%A6%E3%81%8F%E3%81%A0%E3%81%95%E3%81%84- const transporter = nodemailer.createTransport({ host: "smtp.sendgrid.net", port: 465, secure: true, auth: { user: "apikey", pass: "SG.****", // https://app.sendgrid.com/settings/api_keys > Create API Key > Mail Send > Custom Access > Mail Send }, }); const info = await transporter.sendMail({ from: "foo@example.org", to: "bar@example.org", subject: "Hello world!", html: "Hello world.", }); console.log(info.messageId);