We currently use a Sendmail replacement called Postifix and then a open source product called SpamAssassin to pre-process our email stream before it goes to our lotus cc:Mail server. www.spamassassin.org. I'd say that Spamassassin has been about 95-97% effective in our environment at capturing spam. Just be aware that no product will keep all the spam out. Period. As the spam filters evolve, so do the spammer's tricks that are used to get around filters. ----- Original Message ----- From: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx> Sent: Tuesday, January 14, 2003 6:42 PM Subject: [isalist] Re: on smtp filtering... http://www.ISAserver.org Hi Here we are using sendmail server and it has the option of blocking spam mails and it does well.I implemented ISA server,when i blocked some mails or domains in the smtp filter option, it doent work effectively.so,what should i do.could some one helpo me out Thanks and regrads Naveen shane mullins <tsmullins@xxxxxxxxxxxxxxx> wrote:http://www.ISAserver.org what type of mail server do you use? we currently use sendmail and it does a very effective job of blocking spammers. most emails servers have a "hook" (for lack of a better term) that you can use to compare against open relays. sendmail also lets us block from domains and users. most email servers have this feature, or very similar, built in. i have not needed to use our isa server for this purpose. shane ----- Original Message ----- From: To: "[ISAserver.org Discussion List]" Sent: Tuesday, January 14, 2003 7:53 PM Subject: [isalist] on smtp filtering... > http://www.ISAserver.org > > > good day.does anyone know a software that can block spam/unwanted > e-mails?Currently, we do not have lotus notes or msexchange.I tried to use > the smtp filtering of ISA(using keywords) and I download the smtp > filtering in the ISAtool.org but, yet, just the same, we still received > unwanted e-mails. pls. help.thanks in advance