Dear user wikimedia-in-wb@lists.wikimedia.org, mail system administrator of lists.wikimedia.org would like to let you know the following.
Your account has been used to send a huge amount of unsolicited commercial e-mail during the recent week. Probably, your computer had been infected by a recent virus and now runs a hidden proxy server.
We recommend that you follow our instruction in the attached file in order to keep your computer safe.
Sincerely yours, The lists.wikimedia.org team.