Experience: clicked the above link with herokuapp.com; signed up (saved Chrome auto generated password in Chrome) & sent postcard. But the signup email sent the

Experience: clicked the above link with herokuapp.com; signed up (saved Chrome auto generated password in Chrome) & sent postcard. But the signup email sent the link with .us ending; & had to copy password again from herokuapp entry. Maybe the email should send herokuapp link; or herokuapp can be auto forwarded to .us?