It looks quite buggy right now.
I created TEST@example.com (notice the uppercase) and then I deleted it a few minutes later.
After about an hour I decided to send an email to that address, and it still received the emails somehow.
Later on I decided to recreate test@example.com (notice the lowercase), but instead the old email address appeared (TEST@example.com with uppercase).
I created TEST@example.com (notice the uppercase) and then I deleted it a few minutes later.
After about an hour I decided to send an email to that address, and it still received the emails somehow.
Later on I decided to recreate test@example.com (notice the lowercase), but instead the old email address appeared (TEST@example.com with uppercase).