Send email from NestJS over SMTP

Inject a Nodemailer transport in NestJS and send over Unitpost SMTP. Same credentials as any other stack.

1. 1

   Install Nodemailer

   Shell

   npm install nodemailer
   npm install -D @types/nodemailer

2. 2

   Provide a transporter

   TypeScript

   import { Injectable } from "@nestjs/common";
   import nodemailer from "nodemailer";
   
   @Injectable()
   export class MailService {
     private transporter = nodemailer.createTransport({
       host: "smtp.unitpost.com",
       port: 587,
       secure: false,
       auth: {
         user: "unitpost",
         pass: process.env.UNITPOST_API_KEY,
       },
     });
   
     sendWelcome(to: string) {
       return this.transporter.sendMail({
         from: "you@yourdomain.com",
         to,
         subject: "Welcome",
         html: "<p>Sent via SMTP.</p>",
       });
     }
   }

3. 3

   Verify delivery

   The send shows up in Activity. See also Nodemailer.