code: def send_community_request_email(increq):
      
      from flask_mail import Message
      from invenio_mail.tasks import send_email
  
      msg_body = format_request_email_body(increq)
      msg_title = format_request_email_title(increq)
  
      sender = current_app.config['COMMUNITIES_REQUEST_EMAIL_SENDER']
  
      msg = Message(
          msg_title,
          sender=sender,
          recipients=[increq.community.owner.email, ],
          body=msg_body
      )
  
      send_email.delay(msg.__dict__)
docs: Signal for sending emails after community inclusion request.