Mail Attack 2005-08-23 - By Jessica Zhu
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Hi,
It looks like we are experiencing the mail attack now.
In our maillog, we have a lot of User Unknown message like the following.
Aug 23 11:52:25 s1 sendmail[2110]: j7NFqPL02110:
<Oscard@(protected)>... User unknown
Aug 23 11:52:25 s1 sendmail[2110]: j7NFqPL02110: from=<>,
size=17601, class=0, nrcpts=0, proto=ESMTP, daemon=MTA,
relay=mail.vis-inc.net [66.77.28.202]
It looks like that all the from is <>, does anyone have the way to fight
against it.
Jessica
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