Collect emails, send transactional emails, product updates, and email drip.

I've built 5 SaaS in the last 2 years, and I know how email is crucial to engage with your customers, still in 2023.

Shipped comes with support for two popular products, MailChimp and Loops.

Both allow you to:

  • Collect user emails

  • Send product update emails to the subscribers

  • Configure an email drip

  • Send transactional emails from your product

MailChimp setup


Find your Audience ID

You need it to add the users to your email list.

Log in to your MailChimp account and then:

  1. Click Audience

  2. Click All contacts

  3. If you have more than one audience, click the Current audience drop-down and choose the one you want to work with.

  4. Click the Settings drop-down and choose Audience name and defaults.

  5. In the Audience ID section, you’ll see a string of letters and numbers. This is your audience ID.

Save the value into MAILCHIMP_AUDIENCE_LIST_ID in the .env file

Create your API Key

Needed to send transactional emails.

  1. Navigate to the API Keys section of your account.

  2. Click Create New Key.

  3. Name your key. Be descriptive, so you know what app uses that key. Keep in mind that you’ll see only this name and the first 4 key digits on your list of API keys.

  4. Click Generate Key.

  5. Once we generate your key, click Copy Key to Clipboard. Save your key someplace secure–you won’t be able to see or copy it again. If you lose this key, you’ll need to generate a new key and update any integration that uses it.

  6. Click Done.

Save the value into MAILCHIMP_API_KEY in the .env file

Configure server prefix

To find the value for the server log into your Mailchimp account and look at the URL in your browser. You’ll see something like The us19 part is the server prefix. Note that your specific value may be different.

Save the value into MAILCHIMP_SERVER_PREFIX in the .env file

Add a new email contact at sign-up

Open the file src/config/auth.ts and uncomment addMailChimpListMember in the signIn event handler

events: {
  async signIn(event) {
    if (event.isNewUser && 
      await addMailChimpListMember({
        firstName: || "",
        lastName: "",
        tags: ["new-user"],


Learn more about the MailChimp Marketing API on the documentation

Send transactional email

import { sendTransactionalEmail } from "@/libs/mailchimp";

await sendTransactionalEmail({
    to: ["", ""],
    subject: "You reached the limits",
    text: "Upgrade to get more requests",
    html: "<p>Upgrade to get more</p>"

Send transactional email with template

Define and store your template in MailChimp.

import { sendTransactionalEmailWithTemplate } from "@/libs/mailchimp";

await sendTransactionalEmailWithTemplate({
    to: ["", ""],
    subjplateName: "my template",
    mergeTags: [{ 
        name: "merge1",
        content: "merge1 content",

Learn more about the MailChimp Transactional API on the documentation

Loops setup

To set up Loops you need to create an API Key.

Create API Key

  1. Log in to Loops

  2. Go to Settings

  3. Click on API

  4. Click on Generate key

  5. Copy the key and paste it to .env as the value for LOOPS_API_KEY

Add a new contact at sign-up

Open the file src/config/auth.ts and uncomment createLoopsContact in the signIn event handler

events: {
  async signIn(event) {
    if (event.isNewUser && {
      await createLoopsContact({
        firstName: || "",
        lastName: "",
        userGroup: "new-user",


Send a transactional email

Go to Loops and create a new Transactional. Copy the transactional id.

import { sendTransactionalEmail } from "@/libs/loops";

await sendTransactionalEmail({
    "clfq6dinn000yl70fgwwyp82l", // <-- transactional id
    "", // <-- to email
        loginUrl: "" // <-- dynamic content

Learn more about the Loops API in the documentation

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