new_contents: # Copyright (c) 2021, Frappe Technologies Pvt. Ltd. and Contributors
  # MIT License. See LICENSE
  
  from frappe.exceptions import ValidationError
  
  class NewsletterAlreadySentError(ValidationError):
  	pass
  
  class NoRecipientFoundError(ValidationError):
  	pass
  
  class NewsletterNotSavedError(ValidationError):
  	pass
  
subject: Add exceptions classes for Newsletter