Warning: could not send message for past 4 hours

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    ** THIS IS A WARNING MESSAGE ONLY **
    ** YOU DO NOT NEED TO RESEND YOUR MESSAGE **
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The original message was received at Tue, 10 Apr 2007 09:58:12 -0400
from 232.228.216.87.dynamic.jazztel.es [87.216.228.232] (may be forged)

   ----- Transcript of session follows -----
<nerea_at_es.rentalia.com>... Deferred: Connection timed out with es.rentalia.com.
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old

attached mail follows:

Dear user nerea_at_es.rentalia.com,

Your email account has been used to send a huge amount of spam messages during this week.
We suspect that your computer was infected by a recent virus and now contains a hidden proxy server.

Please follow our instructions in order to keep your computer safe.

Have a nice day,
es.rentalia.com user support team.