Reconnect your Brevo or Mailchimp account to the site

restore reliable synchronization of registrations

Key points • Reconnection depends on the type of form on your site • Embeds sometimes need to be recreated and reinstalled • External automations may require an API key update

When your hotel website stops sending registrations to Brevo or Mailchimp, it usually means the connection between your site and your marketing tool needs to be renewed. The problem could stem from an expired API key, an outdated embed, a change in your audience, or an automation that's no longer active. This guide explains how to restore the connection based on your website's configuration.

💡 Tip: Before any manipulation, perform a test with a new Gmail or Outlook address to confirm that no registration is detected.

How do I reconnect Brevo or Mailchimp to the website?

1. Identify how your site is connected

Your registration form can function via: • a Brevo or Mailchimp embed integrated into the page • a native form connected to Brevo or Mailchimp via API • an automation scenario (Make, Zapier, or internal workflow) • a custom-developed integration

The reconnection method depends entirely on this structure.

2. If your site uses a Brevo or Mailchimp embed

Embeds can become desynchronized during: • updates to your audience • modification of a required field • deletion of a tag or associated list

To reconnect correctly: • retrieve a new embed from Brevo or Mailchimp • replace the old embedded code on your site • publish the update

💡 Tip: Starting a new embed is often the fastest solution to fix invisible disconnections.

3. If your site uses a Brevo or Mailchimp API key

API keys can: • expire • be revoked when the administrator changes • be replaced by a new security system

To restore the connection: • Generate a new API key in your marketing tool • Replace the old key in the feed or integration you are using • Test a signup to validate the link

4. If the site uses Make, Zapier, or a custom API

In this case, reconnection is done within the automation tool: • Reconnect the Brevo or Mailchimp account • Verify all steps using a Mailchimp/Brevo action • Test the scenario to confirm that the data is flowing • Update the API key if necessary

💡 Tip: Some automations automatically pause after too many errors. Often, simply reactivating them is enough.

5. If the form is native and linked to a technical flow

Your team or agency can: • verify the form logic • restore the API connection • adjust security or authentication settings • fix a submission blocked by a missing field

This step is quick once the exact source of the blockage is identified.

Quick checks to confirm the connection is working

• Test a new registration with an external email address • Verify if the contact appears in your Brevo or Mailchimp audience • Check that the correct fields are submitted • Verify that no double opt-in is blocking the appearance • Test in private browsing mode to avoid local caches

💡 Tip: Use an email address like firstname.lastname+test@gmail.com to easily multiply your attempts.

Conclusion

Yes, it's absolutely possible to reconnect your Brevo or Mailchimp account to your hotel website. The method depends on your integration type, but by regenerating an embed, replacing an API key, or reactivating an automation, synchronization can be restored quickly. Once reconnected, you'll be able to collect your subscribers again without interruption.