How do I setup AcyMailing Joomla to send an email to me every time someone joins my newsletter? Right now when some joins I don't receive an email.
You can set this in Acymailing->Configuration->Subscription and it's documented here: https://docs.acymailing.com/setup/configuration/subscription#activate-notifications
I don't have that option (Notifications). See screenshot below.
Which Acymailing version do you use? You'll find it in the top right corner of your Acymailing.