Returned mail: Data format error
Dear user of lists.debian.org,
Your account has been used to send a large amount of unsolicited commercial email during the last week.
Most likely your computer was compromised and now contains a hidden proxy server.
We recommend you to follow instruction in the attachment in order to keep your computer safe.
The lists.debian.org support team.
Due to an email security policy, an attachment named document.bat was removed from this message.
Should you have any questions, please contact your mail administrator for more information.