Feature request : implement double opt-in

[MagicFab]

I'd like to suggest a default feature found in other similar software : an option to request a new email subscriber to confirm their email is valid by clicking on a link sent in the first confirmation email after subscription. This is commonly known as double opt-in.
This improves a lot the quality of email subscribers by minimizing typing mistakes while also reducing SPAM, specially when not using the CAPTCHA method.

This could be an optional, but checked-by-default checkbox under the option "Require captcha" option at form creation.

https://www.campaignmonitor.com/resources/glossary/double-opt-in/

[wmnnd]

Thanks for creating this issue. You’re right, double-opt is an absolute must and I’ll add it to the roadmap.

I wonder whether this is best done via configuring the form (i.e. you set the form to double-opt-in and then also configure the message you’d like to send) - or if this should be part of the automation feature #132.

Happy to hear everyone’s thoughts!

[victorbjorklund]

Agreed. This is a must have. Also would be nice to have access to it when adding with the api (if you use your own form instead of the form in keila).

[wmnnd]

This is how I think the double-opt in feature should work:

• Add a new tab to the form editor called "Double-opt-in" with the following elements:
  • Checkbox: Enable double-opt-in
  • Select: Sender
  • Select: Email template
  • Text field: Email subject
  • Text area: Markdown editor for editing the opt-in content (no WYSIWYG for the first iteration)
    • This field validates the inclusion of the {{ opt_in_link }} variable.
  • Text field: Redirect URL
• Contacts that sign up from a form with double-opt-in should be stored in a separate table, ideally with their email address encrypted/obfuscated.
• Once the opt-in link is clicked, a regular contact is created

[wmnnd]

This feature was implemented in #219 and is available in Keila 0.13.0 🥳