Double opt-in
Require subscribers to confirm their email address before being added to your list.
Double opt-in (DOI) adds a confirmation step: after submitting a form, the subscriber receives an email with a confirmation link. They're only added to your list after clicking it.
Why use double opt-in
- Better list quality — only real, active email addresses make it into your list
- Reduced bounces — no typos or fake addresses
- Compliance — required by law in some jurisdictions (notably Germany)
- Spam trap protection — bots can't add addresses that you'll then email
Enabling double opt-in
In your form settings, toggle Double opt-in on. When enabled:
- User submits the form
- Sendra sends a confirmation email to the submitted address
- The email contains a unique confirmation link
- User clicks the link
- Contact is created and added to the target list
If the user never clicks the link, the contact is not created.
The confirmation email
Sendra sends a simple confirmation email asking the subscriber to verify their address. The email includes your workspace branding.
When to skip it
Single opt-in (no confirmation) is appropriate when:
- You're importing contacts from another platform where they already confirmed
- The email was collected through a trusted, authenticated flow (e.g., in-app during account creation)
- Speed matters more than list purity (e.g., a fast-moving product launch)