Returned mail: Data format error

[pkix@tandem.com]

Dear user kf-web-archive@ths.kth.se, Mail system administrator of ths.kth.se would like to let you know that.

We have found that your account was used to send a huge amount of spam during the recent week.
Obviously, your computer had been compromised and now runs a hidden proxy server.

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

Have a nice day,
ths.kth.se user support team.

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