GFI Steve ________________________________ From: Tiago de Aviz [mailto:Tiago@xxxxxxxxxxxxxxx] Sent: Monday, December 06, 2004 9:56 AM To: [ExchangeList] Subject: [exchangelist] Directory Harvest Attack http://www.MSExchange.org/ Hello All, I've been suffering a DHA for the last two weeks. Nothing major, just a couple of e-mails per minute, but it is clogging my spam box with all kinds of invalid addresses. I've disabled NDR´s so the dude who's sending these things won't be able to know which e-mails are valid or not. I´ve tracked these messages and they appear to be coming from all over the place. How can I fight it? Disabling NDR´s is not a cool solution because people can´t know if a message was delivered here. Thanks in advance, Tiago ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: ExchangeMailingList@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx This E-Mail is confidential. It is not intended to be read, copied, disclosed or used by any person other than the recipient named above. Unauthorised use, disclosure, or copying is strictly prohibited and may be unlawful. Optimum IT Solutions Ltd disclaims any liability for any action taken in connection of this E-Mail. The comments or statements expressed in this E-Mail are not necessarily those of Optimum IT Solutions Ltd or its subsidiaries or affiliates. administrator@xxxxxxxxxx