Building with Email/Password authentication 

Although Gadget provides a default email/password authentication method, there is a lot of flexibility to configure or build on top of the user emails sent through emails in the action context.

Custom email templates 

Whether you want to customize the copy and style of the emails you send on the sendVerifyEmail/sendResetPassword action or send any other transactional/marketing emails within your app, you can easily do so.

  1. Create a constant value representing the desired custom email template (CustomTemplate) and declare an expression containing an HTML 5 document.

  2. Structure this document however you want your email copy and style to be.

  3. Now to render your custom template, when sending an email (via emails.sendMail()) within the html parameter you will pass the custom template like below:

1export async function onSuccess({ params, record, logger, api, emails }) {
2 if (
3 !record.emailVerified &&
4 record.emailVerificationToken &&
5 params.user?.emailVerificationCode
6 ) {
7 const url = new URL("/verify-email", Config.appUrl);
8 url.searchParams.append("code", params.user?.emailVerificationCode);
10 // create your custom email template
11 const CustomTemplate = `
12 <!DOCTYPE html>
13 <html lang="en">
14 <head>
15 <meta charset="UTF-8">
16 <meta name="viewport" content="width=device-width, initial-scale=1.0">
17 <title>Email Verification</title>
18 </head>
19 <body style="font-family: Arial, sans-serif; background-color: #f7f7f7; margin: 0; padding: 50px;">
20 <div style="max-width: 600px; margin: 0 auto; background-color: #ffffff;">
21 <h1 style="font-size: 24px; margin-bottom: 20px;">Email Verification</h1>
22 <p>Click the button below to verify your email:</p>
23 <a href="<%= url %>" style="color: #ffffff; background-color: #3498db;">Click to Verify Email</a>
24 </div>
25 </body>
26 </html>`;
28 await emails.sendMail({
29 to:,
30 subject: `Verify your email with ${Config.appName}`,
31 // Pass your custom template
32 // The default template is an EJS string
33 html: DefaultEmailTemplates.renderEmailTemplate(CustomTemplate, {
34 url: url.toString(),
35 }),
36 });
37 }

Important to note when passing the CustomTemplate through emails.sendMail():

  • There is no text parameter to pass as that is replaced by the content within your CustomTemplate

Setting up an external transporter 

If you decide to use an external email transport like Amazon SES, SendGrid, etc, you do have the ability to configure that within Gadget.

  1. Create a boot file and declare a value representing the new transport. With this value you'll run emails.setTransport(), for those familiar with Nodemailer this is exactly how createTransport() operates

  2. The parameters passed through setTransport() will be entirely dependent upon the type of transport you wish to use with your app. Refer to the Nodemailer or external transport service documentation for more details on parameters passed.

  3. For example if we wanted to use Mandrill (Mailchimp's transactional email service) as our email transporter we would do the following below:

1import { Server, emails } from "gadget-server";
2// import emails within the file
4// Create the transporter object
5const transporter = {
6 host: "",
7 port: 587,
8 auth: {
11 },
14// Set the transporter to the new configuration

In summary to configure an external transporter:

  1. Create a boot file

  2. Declare the transporter (transport) along with any parameters in a separate code file or within the action.

  3. Use emails.setTransport() and pass the transport value.