Portal

Buttondown offers an opt-out feature available at all billing plans called the Portal, which lets your subscribers change their email address, view their invoices, settings, and unsubscribe or resubscribe to their newsletter. It also gives them an easy way to quickly access this information without having to reach out to you directly.

Subscribers can access the Portal in a few places:

1. It's automatically added to the footer of your emails if Portal is enabled.
2. You can inject it anywhere using the manage_subscription_url template variable.
3. Buttondown's main login page. You can link directly to the subscriber portal login form by using https://buttondown.com/login?subscriber=1, which will automatically show the subscriber login form instead of requiring users to click "I am a subscriber" first.

To turn the setting off, go to Settings > Features > Portal:

You can allow subscribers to add or remove certain tags directly from the Portal. When creating or editing a tag, enable the "Subscriber editable" option to make it appear in the Portal. Subscribers will see these tags as checkboxes they can toggle on or off.

Tags that aren't marked as subscriber editable won't appear in the Portal and can only be managed by you or via the API.

The forms displayed in the subscriber management page are the same as the forms you use to subscribe people to your list: subscribe form inputs. By default, these inputs only change a subscriber's metadata — but, combined with tags and automations, you can use them to give subscribers the ability to change their tags, too.

For simple cases, all you'll need to do is make sure to check the "Automatically tag?" input when creating a new Subscribe form input; this will ensure that, when a subscriber changes their metadata, the corresponding tags will change as well.

Some caveats:

• It is not currently possible to only allow some subscribe form inputs to be changed by subscribers. If you enable Portal, all fields will be editable.
• At the moment, the only possible inputs you can vend to your subscribers are "free text", "select", and "checkbox". Support for other input types is planned in the near future.

Checkbox type form inputs create a metadata field that holds two potential string values. You'll need to reference these string values in two different automations for full subscriber autonomy: