You may not be paid or otherwise profit from the use of any University-provided computing resource or from any output produced using it. Further, you may not promote any commercial activity using University resources. You may not use the network, labs, etc., to run or promote a business. All complaints will be investigated. Violations will result in disciplinary action.
Ignorance is no excuse.
Guidelines are available. Read them, and ask if you're at all uncertain about something. Do not send rude or harassing e-mail. If someone asks you to stop sending mail, then stop sending it. If you fail to do so, the person can file a complaint and you can be disciplined.