Resubscribe a user to a MailChimp list after unsubscribe

Question

My site allows users to subscribe to MailChimp lists using the API via Drupal MailChimp module. But if a user unsubscribes by following the link in the email, and subsequently decides to re-subscribe by visiting my website and checking the "subscribe" box, MailChimp responds with

xxx@xxx.xxx is in a compliance state due to unsubscribe, bounce, or compliance review and cannot be subscribed.

What is the solution assuming the user really wants to re-subscribe?

Answer 1

Set the member's status to pending. That should resend the opt-in email.

Answer 2

If we need to resubscribe an email which has been unsubscribed,

We need to make a put call with either of the following options:

1. {"status" : "subscribed"} Will resubscribe the email
2. {"status" : "pending"} Will send a confirmation email for resubscription.

The API endpoint must consist of md5 hash like(/lists/list_id/members/md5hash)

Answer 3

First get the status from response, if it is unsubscribed then update the list.This will do the trick ;)

const mailchimp = require("@mailchimp/mailchimp_marketing");
const md5 = require("md5");

router.post("/newsletter-subscribe", asyncWrapper(async (req, res) => {

mailchimp.setConfig({
apiKey: "e4ef******62c481-us17",
server: "us17",
});

const subscriber_hash = md5(email.toLowerCase());
const list_id = '44b****47';
let response = await mailchimp.lists.setListMember(
  list_id,
  subscriber_hash,
  {
    email_address: email,
    status_if_new: 'subscribed',
  }
);
if(response.status=='unsubscribed'){
    response = await mailchimp.lists.updateListMember(
        list_id,
        subscriber_hash,
        {status: 'subscribed'}
      );
}
 return res.json({'subscribed': response.status});


}));

Answer 4

One option is to use the API: First, set them to pending, then set them to subscribe. Setting the user to pending will apparently send a confirmation email, but you can ensure confirmation by setting them as subscribed.

I included a Python script below to resubscribe a list of emails

import hashlib
import requests
import time

# Replace these with your API key and List ID
API_KEY = 'cc2355555555555555555555555555-us1'
LIST_ID = 'c555555555'

# Replace this with your datacenter, e.g. 'us6'
DATACENTER = 'us1'

# List of email addresses to resubscribe
email_addresses = ['email@address.com','email2@address.com']

# Get the total number of email addresses
total_addresses = len(email_addresses)

# Loop through email addresses
for index, email in enumerate(email_addresses):
    # Create md5 hash of the lowercase email address
    email_hash = hashlib.md5(email.lower().encode()).hexdigest()

    # API URL to update the member
    url = f'https://{DATACENTER}.api.mailchimp.com/3.0/lists/{LIST_ID}/members/{email_hash}'

    # Data to update (set status to 'pending' to send opt-in confirmation email)
    data_pending = {
        'status': 'pending',
        'email_address': email
    }

    # Make a PUT request to update the member to pending
    response = requests.put(url, json=data_pending, auth=('anystring', API_KEY))
    
    # Print the response
    print(f'Response for {email} (pending): {response.status_code} - {response.text}')

    # Optional: Wait for a few seconds before updating the status to subscribed
    time.sleep(5)

    # Data to update (set status to 'subscribed')
    data_subscribed = {
        'status': 'subscribed',
        'email_address': email
    }

    # Make a PUT request to update the member to subscribed
    response = requests.put(url, json=data_subscribed, auth=('anystring', API_KEY))

    # Print the response
    print(f'Response for {email} (subscribed): {response.status_code} - {response.text}')

    # Calculate and print the progress percentage
    progress_percentage = (index + 1) / total_addresses * 100
    print(f'Progress: {progress_percentage:.2f}%')