I don't quite understand. You can post, obviously, so you're not on any "no-fly list". Changing your password should be done on the User Control Panel, Profile tab, Edit Account Settings. You can also change your password there if you want, but it's not required. You can get a free email address from lots of places. I have a couple of throw-away Google addresses that I use just for registering on websites. For passwords, I use LastPass. There are also other password managers available if you prefer. I have far too many passwords to remember, so I don't try. I only have to remember one master password.