At the moment the following role addresses are in a global blacklist, i.e. unable to receive emails from Pushwoosh:
So, the account with one of such email addresses could not be registered in Pushwoosh because you will not receive an activation email. Moreover, you will not receive invoice emails, daily app stats, reminders, and newsletters.
Also, such addresses are unable to receive invite emails if you are using the Multi-Login feature.
In order to avoid such situations, we recommend using personal addresses for registration, invites and as a billing address.