This is really a good solution. At our site we route all our clients email through a Slackware Linux box running Sendmail, Spam Assassin, Clam-AV, and Milter (which allows us to write custom Perl scripts against incoming mail(ex: checking if the recipient is valid in AD)(Yes, we have a part time Unix Admin!). Then the Exchange server at the clients site only allows (connection filtering) connections from our Sendmail server. Bottom line is if you can build this it's a great solution. Pickup whatever Linux distro your comfortable with or that you can find local support for (Linux user group) and go for it! I'm a mid-level admin on Linux and I built the solution using Debian, Spam Assassin, Clam-AV and had it working in less than a week. To test how affective it was working I installed Group shield and Spam Killer from McAfee and found that it wasn't worth running these extra services when the Linux solution is getting the job done! Good luck, Tim PS: If your new to Linux. Mandrake is very easy to get started in and lots of support available! They have packages for most of this and it installs nicely. The GUI is also very easy to navigate. I worked with Mandrake download edition (free) for two years and now I'm a club member and the support is even better, they even have good doc's (which is a great compliment in the Linux world!). -----Original Message----- From: Danny [mailto:nocmonkey@xxxxxxxxx] Sent: Friday, December 17, 2004 5:21 AM To: [ExchangeList] Subject: [exchangelist] RE: connection filtering on HELO/EHLO http://www.MSExchange.org/ On Fri, 17 Dec 2004 15:12:07 +0100, Dan HINCKLEY <dah@xxxxxxxxxxx> wrote: > http://www.MSExchange.org/ > > Some, on my Macintosh [ :-)) ] and on linux boxes. Install FreeBSD... http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/index.html http://www.onlamp.com/pub/a/bsd/2004/08/26/FreeBSD_Basics.html and Postifx... http://www.postfix.org http://www.onlamp.com/pub/a/bsd/2003/08/21/postfix.html on an old PC. Email me off-list if you are interested. I will tell you how to setup a secure email gateway/firewall to put in-front of your Exchange server to drastically reduce your spam and the load on your Exchange server for free (plus the cost of your $40 PC that you will install it on ;)...). ...D ------------------------------------------------------ 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: tim@xxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx