sry for annoying. but i didn't get email confirmation mail from deep onion community forum. i registered yesterday
Welcome to deeponion

Its works only with a mail adress from hotmail, gmail or yahoo at the moment.

You can change your mail adress in the deeponion forum under "your account->settings->contact details".
After the change to a new mail adress, you can request a new mail to confirm.
The new mail should come immediately.

it works actually for most of other email services, especially some rare country TLD domains, email services with some extra rules, not working.