From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1G2u5Z-00023H-QR for garchives@archives.gentoo.org; Tue, 18 Jul 2006 18:14:34 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.13.7/8.13.6) with SMTP id k6IICZOS018155; Tue, 18 Jul 2006 18:12:35 GMT Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.191]) by robin.gentoo.org (8.13.7/8.13.6) with ESMTP id k6II3PJs001743 for ; Tue, 18 Jul 2006 18:03:25 GMT Received: by nf-out-0910.google.com with SMTP id m19so29355nfc for ; Tue, 18 Jul 2006 11:03:26 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=omaHfVVqOPjZzg4LgPvqJH9RxE/8Re66doZcOWKNCVkRpgyrfQ20NtJYCY0O/hS+l65kW0Nzr0AIm0RHqO5DPUUJ0F1A+EbIAs3BVMZrFsDiXklmqPIPJrVkuyTS+O9tTkTrlfHxttwEpD2rA/Ea7eV8I3JbQJUsvMRvdAnL1Hk= Received: by 10.48.42.1 with SMTP id p1mr932554nfp; Tue, 18 Jul 2006 11:03:25 -0700 (PDT) Received: by 10.48.238.18 with HTTP; Tue, 18 Jul 2006 11:03:25 -0700 (PDT) Message-ID: <49bf44f10607181103w49248252uc339fcbe533a9eca@mail.gmail.com> Date: Tue, 18 Jul 2006 11:03:25 -0700 From: Grant To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Filtering spam for a business address In-Reply-To: <44BD1CFF.2070306@badapple.net> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <49bf44f10607180910ya318a57jd6bc144fbddbaaa3@mail.gmail.com> <44BD1CFF.2070306@badapple.net> X-Archives-Salt: 34618c09-b276-4ca7-9473-3ec42705d8b1 X-Archives-Hash: 7590a3249a258993bbf4c983e59c6d42 > > Does anyone use a spam-filtering solution they think is accurate > > enough to use with a business email address? I'm getting tons of spam > > and I'd really like to try and filter it out, but I need to make sure > > I don't miss any legitimate email. I'm using postfix and > > courier-imap. > > > > - Grant > > Greylisting because it doesn't filter anything it merely delays email > with a temp 450 error. Real emails retry after an interval and spam does > not so it eliminates about 90-95%. Couple with reasonable Postfix checks > like making sure the sender domain exists, etc and a mail client with > internal filtering. With the above in place I see maybe 1-2 actual spams > in my inbox a week and averaging about eight a day in my spam folder. > > Postgrey is in portage and it'll take you about almost two full minutes > to get setup and working. I suggest making the the greylist time 30 > seconds and the whitelist time 32 days. > > kashani That sounds really nice. Would you say sending back a 450 error is 100% reliable? Which config option makes postfix check to see if the sender domain exists. I can't find it in /etc/postfix/main.cf. - Grant -- gentoo-user@gentoo.org mailing list