old_contents: """
  byceps.services.email.service
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  :Copyright: 2006-2017 Jochen Kupperschmidt
  :License: Modified BSD, see LICENSE for details.
  """
  
  from typing import List, Optional
  
  from ... import email
  from ...typing import BrandID
  
  from .models import EmailConfig
  
  
  def find_sender_address_for_brand(brand_id: BrandID) -> Optional[str]:
      """Return the configured sender e-mail address for the brand."""
      config = EmailConfig.query.get(brand_id)
      return config.sender_address
  
  
  def send_email(recipients: List[str], subject: str, body: str, *,
                 sender: Optional[str]=None) -> None:
      """Send an e-mail."""
      email.send(recipients, subject, body, sender=sender)
  
new_contents: """
  byceps.services.email.service
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  :Copyright: 2006-2017 Jochen Kupperschmidt
  :License: Modified BSD, see LICENSE for details.
  """
  
  from typing import List, Optional
  
  from ... import email
  from ...typing import BrandID
  
  from .models import EmailConfig
  
  
  def find_sender_address_for_brand(brand_id: BrandID) -> Optional[str]:
      """Return the configured sender e-mail address for the brand."""
      config = EmailConfig.query.get(brand_id)
  
      if config is None:
          return None
  
      return config.sender_address
  
  
  def send_email(recipients: List[str], subject: str, body: str, *,
                 sender: Optional[str]=None) -> None:
      """Send an e-mail."""
      email.send(recipients, subject, body, sender=sender)
  
subject: Return `None` if no email configuration exists for brand instead of raising an exception