Send, create or reply to so called "mailbombs" (i.e., emailing copies of a single message to many users, or sending large or multiple files or messages to a single user with malicious intent) or engage in "spamming" (i.e., unsolicited emailing for business or other purposes) or undertake any other activity which may adversely affect the operation or enjoyment of this Service by any other person;</li> <li>