From owner-freebsd-questions Sun Dec 29 10: 7:12 2002 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1C12237B401 for ; Sun, 29 Dec 2002 10:07:11 -0800 (PST) Received: from mgw1-out.MEIway.com (mgw1.meiway.com [212.73.210.75]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6CF6043EC5 for ; Sun, 29 Dec 2002 10:07:09 -0800 (PST) (envelope-from LConrad@Go2France.com) Received: from VirusGate.MEIway.com (virus-gate.meiway.com [212.73.210.91]) by mgw1-out.MEIway.com (Postfix Relay Hub) with ESMTP id EEED9EF909 for ; Sun, 29 Dec 2002 19:03:48 +0100 (CET) Received: from localhost (localhost.meiway.com [127.0.0.1]) by VirusGate.MEIway.com (Postfix) with SMTP id BE8995D009 for ; Sun, 29 Dec 2002 19:08:19 +0100 (CET) Received: from mail.Go2France.com (ms1.meiway.com [212.73.210.73]) by VirusGate.MEIway.com (Postfix) with ESMTP id 585065D008 for ; Sun, 29 Dec 2002 19:08:19 +0100 (CET) Received: from tx0-go2france-c.Go2France.com [66.64.14.18] by mail.Go2France.com with ESMTP (SMTPD32-6.06) id ACF89B017E; Sun, 29 Dec 2002 19:20:40 +0100 Message-Id: <5.1.1.6.2.20021229120024.02033e30@mail.go2france.com> X-Sender: LConrad@Go2France.com@mail.go2france.com X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 Date: Sun, 29 Dec 2002 12:06:42 -0600 To: freebsd-questions@freebsd.org From: Len Conrad Subject: Re: What are the SMTP rules for sending mail to FreeBSD In-Reply-To: <20021229174746.GS348@freepuppy.bellavista.cz> References: <20021228191235.K46519@slave.east.ath.cx> <3E0DACCB.5090402@quadtelecom.com> <20021228191235.K46519@slave.east.ath.cx> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG >ISTR Postfix replies with 450 to (almost) all errors by default. And there are errors where you need to escalate the 4xx response to 554 to stop the sending MTA from re-trying for days, or just harvest the 4xx ip's to a new .map filean block with 554. Postfix's new "sender address verification" is extremely effective in blocking crap that used to get through, but it always returns 4xx so your reject counts go through the roof as SAV 4xx rejects are re-tried 100's of times. But, in fact, this is more of a resource consumption for the senders than it is on your MX. And the advantage of keeping this crap out of your system outweighs the higher rate of repeated rejects. Len To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message