check that the newsletter sign-up scenario is active

check if all tags (sign-up form tags) are included in the scenario in the ADJUST section

check the email address in the CRM in edrone, perhaps the customer has already subscribed to your newsletter in the past and is in the system as 'subscribed' (in this case, he will not receive any message from the newsletter sign-up scenario)

check if the e-mail address is in the edrone database with the status "unsubscribed"; no messages can be sent to such users

if you have recently made changes to the structure of the forms used to collect sign-ups - please let us know, this often requires a modification of our plug-in to maintain proper data transfer