Enable Double Opt-In

Double opt-in keeps people off your marketing list until they prove they own the inbox. The signup is the first opt-in. The confirmation click is the second.

Enable it before you collect subscribers in a market that expects consent evidence (France, the EEA, and most public capture pages). Lumail's native flow is the supported one — do not invent a custom confirmation state machine with the transactional API.

What it does

With Enable Double Opt-In on:

1. A new subscriber is created as PENDING_CONFIRMATION.
2. Lumail sends your confirmation email from the organization's default sender.
3. The subscriber clicks {{confirmUrl}}.
4. Their status becomes SUBSCRIBED. Lumail stores confirmedAt and confirmationIp, writes a subscribed timeline event, and starts tag-triggered workflows.

Until that click, they do not receive campaigns or workflow marketing emails. Filter Subscribers → Pending Confirmation to see who is waiting.

How the confirmation works

Signup (form, API, capture page, integration)
        ↓
PENDING_CONFIRMATION  +  confirmation email (24h token)
        ↓
Click {{confirmUrl}}  →  /confirm?token=…
        ↓
SUBSCRIBED  +  confirmedAt / confirmationIp  +  workflows

The confirmation link is a single-use token URL. A second subscribe POST for the same pending address does not send a second email or rotate the token. If they never click, they stay pending — turning the setting off later does not subscribe them for you.

Existing SUBSCRIBED contacts are left alone when you enable the setting. Only new subscribers go pending.

Enable it

1. Open Settings → Configuration. The URL is /orgs/[your-org]/settings/configuration.
2. Find the Double Opt-In card.
3. Turn Enable Double Opt-In on.
4. Click Save.

The first card on Configuration. The switch is organization-wide.

Control	What it does
Enable Double Opt-In	New subscribers are PENDING_CONFIRMATION and get a confirmation email