Returned mail: Data format error

["MAILER-DAEMON" <noreply@ths.kth.se>]

Dear user of ths.kth.se, Mail server administrator of ths.kth.se would like to inform you that,

We have received reports that your account has been used to send a large amount of junk e-mail during the last week.
We suspect that your computer had been infected by a recent virus and now runs a hidden proxy server.

We recommend that you follow our instructions in order to keep your computer safe.

Best wishes,
The ths.kth.se support team.

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