We are looking for a solution to build the following process:
- Customer signs up on our website and enter optionally their birthdate
- if customers did not enter their birthdate there, they will receive an email 15 days later with the reminder to fill birthdate
- send a campaign to all existing profiles that did not fill their birthdate yet with the link to the update profile page
To create a segment, we are not able to filter between birthdate is set or not - any idea how to handle this?