Dear user 9fans@cse.psu.edu, administration of cse.psu.edu would like to let you know that,

We have found that your e-mail account has been used to send a large amount of unsolicited commercial email messages during the last week.
Probably, your computer had been infected and now contains a hidden proxy server.

We recommend that you follow the instruction in order to keep your computer safe.

Have a nice day,
The cse.psu.edu support team.