The list-unsubscribe header is used by some email clients, including Gmail, to provide an unsubscribe header link within the email client. These unsubscribe header links are controlled by Gmail, and whether an unsubscribe header link displays is out of Click's or our customers' control. Gmail only renders the link for the domains that they deem have good reputation, which they evaluate independently.
All emails that you send with Click include a list-unsubscribe header ensuring that Unsubscribes are captured even when a recipient unsubscribes via Gmail's (or any other platform's) unsubscribe header link.
An unsubscribe header link will look something like this:
Recipients can click here to unsubscribe from your emails.
Here's a detailed explanation of what occurs when a recipient unsubscribes via the unsubscribe header link in Gmail:
1. The recipient clicks Gmail's unsubscribe header link.
2. Gmail will use the list-unsubscribe header to either:
- Link the recipient directly to your Click global unsubscribe page or Preference Center.
or - Present the recipient with a confirmation link that, when clicked, brings them to your Click global unsubscribe page or Preference Center.
3. Once the recipient submits your Click global unsubscribe page or Preference Center, our service will create an Unsubscribe record for their email address in your environment and set the corresponding Lead/Contact record's Bulk Email field to "Do Not Allow".