old_contents: from django.contrib.sessions.models import Session
  from django.dispatch import receiver
  from django.utils.translation import ugettext as _
  from account.signals import email_confirmation_sent, user_signed_up
  
  from board.models import Board, Notification
  from board.utils import treedict
  
  
  @receiver(email_confirmation_sent)
  def email_confirmation_sent_callback(sender, confirmation, **kwargs):
      user = confirmation.email_address.user
      # Logout user
      [s.delete() for s in Session.objects.all() if s.get_decoded().get('_auth_user_id') == user.id]
  
  
  @receiver(user_signed_up)
  def user_signed_up_callback(sender, user, form, **kwargs):
      user.is_active = True
      user.save()
      data = treedict()
      data['type'] = 'SITE_ANNOUNCEMENT'
      data['message']  = _('New site announcement')
      data['text'] = _('Welcome to herocomics! We strongly recommend you read the announcements.')
      data['url'] = Board.objects.get(slug='notice').get_absolute_url()
      Notification.create(None, user, data)
  
new_contents: from django.contrib.sessions.models import Session
  from django.dispatch import receiver
  from django.utils.translation import ugettext as _
  from account.models import EmailAddress
  from account.signals import email_confirmation_sent, password_changed, user_signed_up
  
  from board.models import Board, Notification
  from board.utils import treedict
  
  
  @receiver(email_confirmation_sent)
  def email_confirmation_sent_callback(sender, confirmation, **kwargs):
      user = confirmation.email_address.user
      # Logout user
      [s.delete() for s in Session.objects.all() if s.get_decoded().get('_auth_user_id') == user.id]
  
  
  @receiver(user_signed_up)
  def user_signed_up_callback(sender, user, form, **kwargs):
      user.is_active = True
      user.save()
      data = treedict()
      data['type'] = 'SITE_ANNOUNCEMENT'
      data['message']  = _('New site announcement')
      data['text'] = _('Welcome to herocomics! We strongly recommend you read the announcements.')
      data['url'] = Board.objects.get(slug='notice').get_absolute_url()
      Notification.create(None, user, data)
  
  
  @receiver(password_changed)
  def password_changed_callback(sender, user, **kwargs):
      email = EmailAddress.objects.get_primary(user)
      if not email.verified:
          email.verified = True
      email.save()
  
subject: Set user.email_address.verified as true when user changed his password