wasteland.rfc822.org is an anonymous, receive only webmailer. It can be used to redirect all these anoying registration and newsletter mails to a mail waste dump.
There is currently no expiration process in place although it can be done easily
I am sorry no. There is no point in setting a password on a garbage can. If you need privacy look out for the commercial available webmail providers like gmail or yahoo.
No i am sorry. wasteland provides public mailboxes withour prior registration. So anyone could decide to use firstname.lastname@example.org and later discover that his waste mails got forwarded to you.
Try sending an email to Florian Lohoff <email@example.com>.