code: def validate_comma_separated_emails(value):
      
      if not isinstance(value, (tuple, list)):
          raise ValidationError('Email list must be a list/tuple.')
  
      for email in value:
          try:
              validate_email_with_name(email)
          except ValidationError:
              raise ValidationError('Invalid email: %s' % email, code='invalid')
docs: Validate every email address in a comma separated list of emails.