If someone enters an invalid email address, we get this error reported.

(e.g. example.como when it should be example.com )

Message type: ERROR
Location: /home/metabrainz/metabrainz.org/venv/lib/python2.7/site-packages/flask/app.py:1423
Module: app
Function: log_exception
Time: 2015-05-19 16:54:48,701
Message:
Exception on /signup/noncommercial [POST]

Traceback (most recent call last):
File "/home/metabrainz/metabrainz.org/venv/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/home/metabrainz/metabrainz.org/venv/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/home/metabrainz/metabrainz.org/venv/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/home/metabrainz/metabrainz.org/venv/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/home/metabrainz/metabrainz.org/venv/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "./metabrainz/users/_init_.py", line 20, in decorated
return f(*args, **kwargs)
File "./metabrainz/users/views.py", line 186, in signup_noncommercial
recipients=[new_user.contact_email],
File "./metabrainz/mail.py", line 48, in send_mail
smtp_server.sendmail(from_addr, recipients, message.as_string())
File "/usr/lib/python2.7/smtplib.py", line 733, in sendmail
raise SMTPRecipientsRefused(senderrs)