promptly notify us if you learn of a security breach related to the service.
4. How You May Not Use the Service.
In using the service, you may not:
use the service in a way that harms us or our affiliates, resellers, distributors, and/or vendors (collectively, the "Microsoft parties"), or any customer of a Microsoft party;
use any portion of the service as a destination linked from any unsolicited bulk messages or unsolicited commercial messages ("spam");
use any unauthorized third party software or service to access the Microsoft instant messaging network (currently known as the .NET Messenger service);
use any automated process or service to access and/or use the service (such as a BOT, a spider, periodic caching of information stored by Microsoft, or "meta-searching");
use any unauthorized means to modify or reroute, or attempt to modify or reroute, the service;
damage, disable, overburden, or impair the service (or the network(s) connected to the service) or interfere with anyone"s use and enjoyment of the service; or
resell or redistribute the service, or any part of the service.
You can find a list of authorized third-party software at http://messenger.msn.com/Help/Authorized.aspx.