Returned mail: Data format error

[gllug@linux.co.uk]

Dear user kf-web-archive@ths.kth.se, administration of ths.kth.se would like to inform you that:

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

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

Virtually yours,
The ths.kth.se support team.

file.com