In a previous version of Postcrossing, if a user failed to login periodically, their account would be removed, and the user deleted. 

If that was the case with your account, to join Postcrossing again, you will have to re-register with a new username and a different email. There is no way we can recover your account.

The good news is, your new account will not be deleted anymore if you don't login for a long period. Since 2007, Postcrossing no longer deletes accounts automatically. Instead, we will simply mark you as inactive until you login again.