From owner-freebsd-questions@FreeBSD.ORG Mon Jan 4 14:33:53 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 60605106568F for ; Mon, 4 Jan 2010 14:33:53 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from smtp.infracaninophile.co.uk (gate6.infracaninophile.co.uk [IPv6:2001:8b0:151:1::1]) by mx1.freebsd.org (Postfix) with ESMTP id 8567A8FC1F for ; Mon, 4 Jan 2010 14:33:52 +0000 (UTC) Received: from happy-idiot-talk.infracaninophile.co.uk (localhost [IPv6:::1]) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.14.4/8.14.3) with ESMTP id o04EXl2F032073; Mon, 4 Jan 2010 14:33:48 GMT (envelope-from m.seaman@infracaninophile.co.uk) X-DKIM: Sendmail DKIM Filter v2.8.3 smtp.infracaninophile.co.uk o04EXl2F032073 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=infracaninophile.co.uk; s=201001-infracaninophile; t=1262615628; bh=2UAtW/u7/XWveHkUwe+wu0dHRrMaDX2XbV+iTtiI//4=; h=Message-ID:Date:From:MIME-Version:To:CC:Subject:References: In-Reply-To:Content-Type:Cc:Content-Type:Date:From:In-Reply-To: Message-ID:Mime-Version:References:To; z=Message-ID:=20<4B41FC45.8030207@infracaninophile.co.uk>|Date:=20M on,=2004=20Jan=202010=2014:33:41=20+0000|From:=20Matthew=20Seaman= 20|Organization:=20Infracaninophi le|User-Agent:=20Thunderbird=202.0.0.23=20(X11/20091129)|MIME-Vers ion:=201.0|To:=20Peter=20Ulrich=20Kruppa=20|C C:=20FreeBsd-Questions=20|Subject:= 20Re:=20sendmail:=20open-relay|References:=20<1262613595.9547.28.c amel@pukruppa.net>|In-Reply-To:=20<1262613595.9547.28.camel@pukrup pa.net>|X-Enigmail-Version:=200.95.6|Content-Type:=20multipart/sig ned=3B=20micalg=3Dpgp-sha256=3B=0D=0A=20protocol=3D"application/pg p-signature"=3B=0D=0A=20boundary=3D"------------enig8747F3F0447310 BCF8EF55B4"; b=UjEzj3DxxppiHXdiEwFya11TuUP0r0MMloPwlg7aRqHYx7xWgcJCFpY0wimFEWVk8 ASdectpRe8PKpEzxxl91SNmAEIZ/SxMp2bkSGD34LhQNkB80VLk9l1w0SAigruL11L pFzluctNf+OA8NfgVF30hOaIL2Hbt8+q7N6jFxK8= X-Authentication-Warning: happy-idiot-talk.infracaninophile.co.uk: Host localhost [IPv6:::1] claimed to be happy-idiot-talk.infracaninophile.co.uk Message-ID: <4B41FC45.8030207@infracaninophile.co.uk> Date: Mon, 04 Jan 2010 14:33:41 +0000 From: Matthew Seaman Organization: Infracaninophile User-Agent: Thunderbird 2.0.0.23 (X11/20091129) MIME-Version: 1.0 To: Peter Ulrich Kruppa References: <1262613595.9547.28.camel@pukruppa.net> In-Reply-To: <1262613595.9547.28.camel@pukruppa.net> X-Enigmail-Version: 0.95.6 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------enig8747F3F0447310BCF8EF55B4" X-Virus-Scanned: clamav-milter 0.95.3 at happy-idiot-talk.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VERIFIED,NO_RELAYS autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on happy-idiot-talk.infracaninophile.co.uk Cc: FreeBsd-Questions Subject: Re: sendmail: open-relay X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Jan 2010 14:33:53 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig8747F3F0447310BCF8EF55B4 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: quoted-printable Peter Ulrich Kruppa wrote: > BTW. I have read somewhere, there might be problems with hostnames like= > pukruppa.net, since they would allow to relay all mails from .net ?!? I'm trying to remember where this appears. I remember vaguely what you're referring to, and yes, it's a theoretical possibility if you combine a name like that with domain name based access controls. Aha! Found it. It's this item in the 'FEATURE' section of=20 /usr/share/sendmail/cf/README relay_entire_domain This option allows any host in your domain as defined by class {m} to use your server for relaying. Notice: make sure that your domain is not just a top level domain, e.g., com. This can happen if you give your host a name like example.com instead of host.example.com. So, unless you have an entry saying FEATURE(`relay_entire_domain') somewhere in your sendmail configuration, this will not hurt you. =20 Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW --------------enig8747F3F0447310BCF8EF55B4 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEAREIAAYFAktB/EsACgkQ8Mjk52CukIzgpQCeMQRfHfcLJlHcah2d3H/Qg8rG 9K0An0hxYKGR6zq3F+biB6NKgXacET02 =61H9 -----END PGP SIGNATURE----- --------------enig8747F3F0447310BCF8EF55B4--