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Version: 0.11.8

Sending Emails

With Wasp's email sending feature, you can easily integrate email functionality into your web application.

main.wasp
app Example {
  ...
  emailSender: {
    provider: <provider>,
    defaultFrom: {
      name: "Example",
      email: "[email protected]"
    },
  }
}

Choose from one of the providers:

  • Mailgun,
  • SendGrid
  • or the good old SMTP.

Optionally, define the defaultFrom field, so you don't need to provide it whenever sending an email.

Sending Emails​

Sending emails while developing

When you run your app in development mode, the emails are not sent. Instead, they are logged to the console.

To enable sending emails in development mode, you need to set the SEND_EMAILS_IN_DEVELOPMENT env variable to true in your .env.server file.

Before jumping into details about setting up various providers, let's see how easy it is to send emails.

You import the emailSender that is provided by the @wasp/email module and call the send method on it.

src/actions/sendEmail.js
import { emailSender } from "@wasp/email/index.js";

// In some action handler...
const info = await emailSender.send({
  from: {
    name: "John Doe",
    email: "[email protected]",
  },
  to: "[email protected]",
  subject: "Saying hello",
  text: "Hello world",
  html: "Hello <strong>world</strong>",
});

Read more about the send method in the API Reference.

The send method returns an object with the status of the sent email. It varies depending on the provider you use.

Providers​

For each provider, you'll need to set up env variables in the .env.server file at the root of your project.

Using the SMTP Provider​

First, set the provider to SMTP in your main.wasp file.

main.wasp
app Example {
  ...
  emailSender: {
    provider: SMTP,
  }
}

Then, add the following env variables to your .env.server file.

.env.server
SMTP_HOST=
SMTP_USERNAME=
SMTP_PASSWORD=
SMTP_PORT=

Many transactional email providers (e.g. Mailgun, SendGrid but also others) can also use SMTP, so you can use them as well.

Using the Mailgun Provider​

Set the provider to Mailgun in the main.wasp file.

main.wasp
app Example {
  ...
  emailSender: {
    provider: Mailgun,
  }
}

Then, get the Mailgun API key and domain and add them to your .env.server file.

Getting the API Key and Domain​

  1. Go to Mailgun and create an account.
  2. Go to API Keys and create a new API key.
  3. Copy the API key and add it to your .env.server file.
  4. Go to Domains and create a new domain.
  5. Copy the domain and add it to your .env.server file.
.env.server
MAILGUN_API_KEY=
MAILGUN_DOMAIN=

Using the SendGrid Provider​

Set the provider field to SendGrid in your main.wasp file.

main.wasp
app Example {
  ...
  emailSender: {
    provider: SendGrid,
  }
}

Then, get the SendGrid API key and add it to your .env.server file.

Getting the API Key​

  1. Go to SendGrid and create an account.
  2. Go to API Keys and create a new API key.
  3. Copy the API key and add it to your .env.server file.
.env.server
SENDGRID_API_KEY=

API Reference​

emailSender dict​

main.wasp
app Example {
  ...
  emailSender: {
    provider: <provider>,
    defaultFrom: {
      name: "Example",
      email: "[email protected]"
    },
  }
}

The emailSender dict has the following fields:

  • provider: Provider required

    The provider you want to use. Choose from SMTP, Mailgun or SendGrid.

  • defaultFrom: dict

    The default sender's details. If you set this field, you don't need to provide the from field when sending an email.

JavaScript API​

Using the emailSender in :

src/actions/sendEmail.js
import { emailSender } from "@wasp/email/index.js";

// In some action handler...
const info = await emailSender.send({
  from: {
    name: "John Doe",
    email: "[email protected]",
  },
  to: "[email protected]",
  subject: "Saying hello",
  text: "Hello world",
  html: "Hello <strong>world</strong>",
});

The send method accepts an object with the following fields:

  • from: object

    The sender's details. If you set up defaultFrom field in the emailSender dict in Wasp file, this field is optional.

    • name: string

      The name of the sender.

    • email: string

      The email address of the sender.

  • to: string required

    The recipient's email address.

  • subject: string required

    The subject of the email.

  • text: string required

    The text version of the email.

  • html: string required

    The HTML version of the email