<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Part of the work is the software - the rest of it is watching, tweaking, deploying and changing your filters. These aren't like light bulbs that you can turn them on and all your spam disappears magically</div><div id="AppleMailSignature"> </div><div id="AppleMailSignature">For that sort of static source Brazilian / other snowshoe spammer Spamhaus sbl / dbl and SURBL should generally be adequate --srs</div><div> On 10-Oct-2015, at 7:28 PM, Suman Kumar Saha <<a href="mailto:suman@bdcert.org">suman@bdcert.org</a>> wrote: </div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html charset=utf-8"><div class="">Now spam sender is more intelligent and they use IP with PTR and most of the cases their IP not been listed in RBLs like the header.We don’t want to let them do business with spam by taking cloud based solution like zero spam/comodo anti spam.Rather we are trying to find a open source solution that works well against spam.</div><div class=""> </div>Return-Path: <<a href="mailto:return@ecommerce.eng.br" class="">return@ecommerce.eng.br</a>> X-Original-To: <a href="mailto:technical@dhakacom.com" class="">technical@dhakacom.com</a> Delivered-To: <a href="mailto:technical@dhakacom.com" class="">technical@dhakacom.com</a> Received: from <a href="http://mail.bdneg.com" class="">mail.bdneg.com</a> (<a href="http://ns3.dhakacom.com" class="">ns3.dhakacom.com</a> [118.179.223.10]) by <a href="http://mail.dhakacom.com" class="">mail.dhakacom.com</a> (Postfix) with ESMTP id 24B188003F6 for <<a href="mailto:technical@dhakacom.com" class="">technical@dhakacom.com</a>>; Sat, 10 Oct 2015 07:23:42 +0600 (BDT) Received: from <a href="http://spcr-11.ecommerce.eng.br" class="">spcr-11.ecommerce.eng.br</a> (<a href="http://spcr-11.ecommerce.eng.br" class="">spcr-11.ecommerce.eng.br</a> [ ]) by <a href="http://mail.bdneg.com" class="">mail.bdneg.com</a> (Postfix) with ESMTP id EE713F802BC for <<a href="mailto:technical@dhakacom.com" class="">technical@dhakacom.com</a>>; Sat, 10 Oct 2015 07:29:15 +0600 (BDT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; s=default; d=<a href="http://ecommerce.eng.br" class="">ecommerce.eng.br</a>; h=To:Subject:Message-ID:Date:From:Reply-To:MIME-Version:List-Unsubscribe:Content-Type:Content-Transfer-Encoding; <a href="mailto:i=abuse@ecommerce.eng.br" class="">i=abuse@ecommerce.eng.br</a>; bh=o93ep8+n7HSq2EnXXlh49f9uThs=; b=Pu7rSAzPy6dlxqPWxYAd5l14JXkykPVOuBPX2FWM3OmDiHyt92N4PYG5k9sJ3tGqrJgdV25kUjBu Hf1TQRCDnPTFDkp+/gymCd7sF/B/SLQyvo0GkLO62WIWqYY2ufqw2dq9dNGiIfACoMt3K0C5Pn7B EM2/02aTMn9feNfu0kc= To: <a href="mailto:technical@dhakacom.com" class="">technical@dhakacom.com</a> Subject: =?UTF-8?B?UHJvbW/Dp8OjbyBkZSBQbmV1cyBOb3Zvcw==?= Message-ID: <<a href="mailto:c00dc236b2712482879b6c1117cdc090@ecommerce.eng.br" class="">c00dc236b2712482879b6c1117cdc090@ecommerce.eng.br</a>> Date: Fri, 09 Oct 2015 19:48:51 -0300 From: "tatuape" <<a href="mailto:nao-responda@ecommerce.eng.br" class="">nao-responda@ecommerce.eng.br</a>/> Reply-To: <a href="mailto:nao-responda@ecommerce.eng.br" class="">nao-responda@ecommerce.eng.br</a>/ MIME-Version: 1.0 X-Mailer-LID: 3,5 List-Unsubscribe: <<a href="http://ecommerce.eng.br/unsubscribe.php?M=420221&C=218ae60a7946264a4d590f99bba14b00&L=3&N=102" class="">http://ecommerce.eng.br/unsubscribe.php?M=420221&C=218ae60a7946264a4d590f99bba14b00&L=3&N=102</a>> X-Mailer-RecptId: 420221 X-Mailer-SID: 102 X-Mailer-Sent-By: 6 Content-Type: multipart/alternative; charset="UTF-8"; boundary="b1_d3ab14ba7a57d5b09e9e3daefd4680ba" Content-Transfer-Encoding: 8bit X-dhakacom-MailScanner-ID: EE713F802BC.AAF1E X-dhakacom-MailScanner: Not scanned: please contact your Internet E-Mail Service Provider for details X-dhakacom-MailScanner-SpamScore: sss X-dhakacom-MailScanner-From: <a href="mailto:return@ecommerce.eng.br" class="">return@ecommerce.eng.br</a> X-Spam-Status: No<div class=""> </div><div class=""> </div><div class="">Thanks</div><div class="">Suman</div><div class=""> <div><blockquote type="cite" class=""><div class="">On Oct 10, 2015, at 7:11 PM, Suresh Ramasubramanian <<a href="mailto:ops.lists@gmail.com" class="">ops.lists@gmail.com</a>> wrote:</div> <div class="">ip block lists are a first and still quite useful line of defense. Spam assassin is a series of score based content filters that supplement Spamhaus and such. SURBL is a URL block list. Beyond a point however filtering has grown enormously complex (and add issues such as dmarc and other authentication) so your constituents might be better off outsourcing their mail hosting to one of several large players in this field (none that are local to Asia / saarc though) --srs <blockquote type="cite" class="">On 10-Oct-2015, at 6:34 PM, Suman Kumar Saha <<a href="mailto:suman@bdcert.org" class="">suman@bdcert.org</a>> wrote: RBL and even PTR record check doesn’t work well.Now spammer also use clean IP and with PTR.Mailscanner/amavis with clamav can’t protect spammers very well. Thanks Suman <blockquote type="cite" class="">On Oct 10, 2015, at 6:59 PM, Suresh Ramasubramanian <<a href="mailto:ops.lists@gmail.com" class="">ops.lists@gmail.com</a>> wrote: Spamassassin together with free and/or cheap depending on usage pattern block lists such as Spamhaus and SURBL Mailscanner plus amavis does a sort of OK job on antivirus but that's a different ball game --srs <blockquote type="cite" class="">On 10-Oct-2015, at 6:14 PM, Suman Kumar Saha <<a href="mailto:suman@bdcert.org" class="">suman@bdcert.org</a>> wrote: Dear ALL, In our community mostly using mailscanner or amavis with postfix/exim as anti spam email gateway.But its perfection is not satisfactory now-a-days.Can you share which open source anti spam application works well. Thanks Suman bdCERT </blockquote></blockquote> </blockquote></div></blockquote></div> </div></div></blockquote></body></html>