Do a search on "squid open realys" and have a look at some sites like http://dsbl.org/main http://spamcop.net/ http://www.openrelaycheck.com/
It is usually someone using your box to send mass emails utilising a squid port that you have inadvertantly left open.
> -----Original Message-----
> From: czesn [mailto:czesn@gazeta.pl]
> Sent: Thursday, 24 April 2003 7:08 AM
> To: squid-users@squid-cache.org
> Subject: [squid-users] Open Relay
>
>
> Hello,
>
> Does anybody heard about Open Relay with squid ? If yes, please, tell
> me how to protect against that.
>
>
>
> --
> Best regards,
> mailto:czesn@gazeta.pl
>
>
>
>
Received on Wed Apr 23 2003 - 18:21:16 MDT
This archive was generated by hypermail pre-2.1.9 : Tue Dec 09 2003 - 17:15:17 MST