From owner-freebsd-stable@FreeBSD.ORG Sat Jan 27 15:40:02 2007 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3842116A406 for ; Sat, 27 Jan 2007 15:40:02 +0000 (UTC) (envelope-from rsmith@xs4all.nl) Received: from smtp-vbr5.xs4all.nl (smtp-vbr5.xs4all.nl [194.109.24.25]) by mx1.freebsd.org (Postfix) with ESMTP id B4FF913C48D for ; Sat, 27 Jan 2007 15:40:01 +0000 (UTC) (envelope-from rsmith@xs4all.nl) Received: from slackbox.xs4all.nl (slackbox.xs4all.nl [213.84.242.160]) by smtp-vbr5.xs4all.nl (8.13.8/8.13.8) with ESMTP id l0RFdrRQ089118; Sat, 27 Jan 2007 16:39:53 +0100 (CET) (envelope-from rsmith@xs4all.nl) Received: by slackbox.xs4all.nl (Postfix, from userid 1001) id 3F271B827; Sat, 27 Jan 2007 16:39:53 +0100 (CET) Date: Sat, 27 Jan 2007 16:39:53 +0100 From: Roland Smith To: JoaoBR Message-ID: <20070127153953.GC96846@slackbox.xs4all.nl> Mail-Followup-To: JoaoBR , Jim Pingle , freebsd-stable@freebsd.org References: <8a20e5000701240903q35b89e14k1ab977df62411784@mail.gmail.com> <20070127141052.GA96039@slackbox.xs4all.nl> <45BB6296.1080106@pingle.org> <200701271304.29216.joao@matik.com.br> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="V88s5gaDVPzZ0KCq" Content-Disposition: inline In-Reply-To: <200701271304.29216.joao@matik.com.br> X-GPG-Fingerprint: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 X-GPG-Key: http://www.xs4all.nl/~rsmith/pubkey.txt X-GPG-Notice: If this message is not signed, don't assume I sent it! User-Agent: Mutt/1.5.13 (2006-08-11) X-Virus-Scanned: by XS4ALL Virus Scanner Cc: freebsd-stable@freebsd.org Subject: Re: Loosing spam fight X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 27 Jan 2007 15:40:02 -0000 --V88s5gaDVPzZ0KCq Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Jan 27, 2007 at 01:04:28PM -0200, JoaoBR wrote: > > Greylisting is a decent idea, but it seems to me that it's just another > > tool in the ongoing arms race against spammers. It may work for a while, > > but eventually they'll catch on and it will only cause unnecessary dela= ys > > for legitimate mail. > > >=20 > finally some cares about the users here, that is a really important > point, how do you justify that your client get the email he is waiting > for an hour later? Probably he looks then for a better service > provider ... The standard requires a retry time of at least 30 minutes: http://tools.ietf.org/html/rfc2821#section-4.5.3=20 But most open-source MTA's will try to resend after around 15 minutes: http://en.wikipedia.org/wiki/Greylisting=20 Note that the SMTP protocol does not guarantee delivery within a certain timeframe.=20 There are timeouts of several minutes for each of the SMTP commands. This means that a full SMTP conversation can last at least 1/2 hour, from one server to another. In short, an extra hour transit time is not a fault or bad service as far as SMTP is concerned. Roland --=20 R.F.Smith http://www.xs4all.nl/~rsmith/ [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725) --V88s5gaDVPzZ0KCq Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.1 (FreeBSD) iD8DBQFFu3JJEnfvsMMhpyURAuj/AJ0R+CB0r+AXXndT/b1WwDwia/MWxACgr30s q9JgCt6ogvbmBvbAb7j3ltQ= =FE05 -----END PGP SIGNATURE----- --V88s5gaDVPzZ0KCq--