On Sun, Mar 1, 2009 at 8:37 AM, Paul Hutchings <[email protected]> wrote: > When I say "stop spam" we use Cloudmark on what gets to Exchange and it's > deathly accurate - really I'm only talking about the perimeter and what gets > through postfix restrictions so not really message content, just the envelope > stuff that the restrictions will look at. >
I told you: I use assp, and works really well, as a matter of fact, it "learns" out of your usual mail flow, so, you have to "retrain" it's system from a couple of directories: spam and notspam, and it also have automatic whitelisting. Believe me: it worth taking a look at it. On the other hand: I have no experience with Cloudmark, but I have seem many commercial spam filters which "overacts", and thus, get you blocked so much mail (authentic mail), that you start to seriously think about just letting the spam in. Assp has proved to be very good, and its free. If you need any further assistance (maybe help replacing your exchange with something just as good, and a lot cheaper), don't hesitate to contact me :) . Once again, I hope this helps, Ildefonso Camargo > -----Original Message----- > From: Jose Ildefonso Camargo Tolosa [mailto:[email protected]] > Sent: 28 February 2009 13:05 > To: Paul Hutchings > Cc: postfix users list > Subject: Re: whitelisting trusted addresses > > Hi! > > On Sun, Mar 1, 2009 at 8:11 AM, Paul Hutchings > <[email protected]> wrote: >> I appreciate that it's hard to make up for the failings of other peoples >> email/internet infrastructure, but I'm looking for options/suggestions >> on how to deal with that old problem of "Blocking unwanted mail when the >> occasional wanted mail has all the characteristics of unwanted mail". > > duh... that's a problem. There should be a pattern on spam and a > pattern on wanted mail, because that's not common mail where you get > an offer for "cheap rolex" or anything like that. > >> >> We use RBL's and basic checks such as rejecting mail with no rdns at >> all, and it stops thousands of spam, but of course as a business, in an >> ideal world I want to accept all legitimate mail regardless of >> characteristics. >> >> Sure I can manually create whitelists but that requires me to know there >> was a problem with a certain domain/host/address. >> >> I think I'm asking the impossible, but I'm curious how other people go >> about handling this problem both technically and politically? > > mmmm.... I use assp http://assp.sourceforge.net/ . It includes some > ways of automagicallly managing whitelists, and other stuff which make > it a very interesting project. Politically........ no idea, that's a > difficult part, because users don't want to understand that spam is an > always evolving problem, and that adapting usually requires time. > > I hope this helps, > > Ildefonso Camargo > >> >> Cheers, >> Paul >> >> -- >> MIRA Ltd >> >> Watling Street, Nuneaton, Warwickshire, CV10 0TU, England. >> >> Registered in England and Wales No. 402570 >> VAT Registration GB 114 5409 96 >> >> The contents of this e-mail are confidential and are solely for the use of >> the intended recipient. >> If you receive this e-mail in error, please delete it and notify us either >> by e-mail, telephone or fax. >> You should not copy, forward or otherwise disclose the content of the e-mail >> as this is prohibited. >> >> >> > > -- > MIRA Ltd > > Watling Street, Nuneaton, Warwickshire, CV10 0TU, England. > > Registered in England and Wales No. 402570 > VAT Registration GB 114 5409 96 > > The contents of this e-mail are confidential and are solely for the use of > the intended recipient. > If you receive this e-mail in error, please delete it and notify us either by > e-mail, telephone or fax. > You should not copy, forward or otherwise disclose the content of the e-mail > as this is prohibited. > > >
