documenso/packages/lib/mail/sendMail.ts

import nodemailer from "nodemailer";
import nodemailerSendgrid from "nodemailer-sendgrid";

export const sendMail = async (to: string, subject: string, body: string) => {
  if (!process.env.SENDGRID_API_KEY)
    throw new Error("Sendgrid API Key not set.");

  const transport = await nodemailer.createTransport(
    nodemailerSendgrid({
      apiKey: process.env.SENDGRID_API_KEY || "",
    })
  );
  await transport
    .sendMail({
      from: process.env.MAIL_FROM,
      to: to,
      subject: subject,
      html: body,
    })
    .catch((err) => {
      throw err;
    });
};