From owner-freebsd-isp@FreeBSD.ORG Sat Feb 26 19:44:33 2005 Return-Path: Delivered-To: freebsd-isp@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id CEBF616A4CE for ; Sat, 26 Feb 2005 19:44:33 +0000 (GMT) Received: from mail.adamstudios.com (mail.adamstudios.com [81.223.239.167]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6695E43D3F for ; Sat, 26 Feb 2005 19:44:33 +0000 (GMT) (envelope-from randy@adamstudios.com) Received: from localhost (localhost.adamstudios.com [127.0.0.1]) by mail.adamstudios.com (Postfix) with ESMTP id D5DB52331; Sat, 26 Feb 2005 20:44:31 +0100 (CET) Received: from mail.adamstudios.com ([127.0.0.1]) by localhost (randbsd.adamstudios.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 40965-10; Sat, 26 Feb 2005 20:44:26 +0100 (CET) Received: from mail.adamstudios.com (localhost.adamstudios.com [127.0.0.1]) by mail.adamstudios.com (Postfix) with ESMTP id 827A62330; Sat, 26 Feb 2005 20:44:26 +0100 (CET) Received: from 213.225.59.156 (SquirrelMail authenticated user randy.adamstudios.com) by mail.adamstudios.com with HTTP; Sat, 26 Feb 2005 20:44:26 +0100 (CET) Message-ID: <52275.213.225.59.156.1109447066.squirrel@mail.adamstudios.com> In-Reply-To: <4220AC5C.7040403@pyramus.com> References: <4219551F.9010808@pyramus.com> <20050221043613.GA21273@wjv.com> <4219C5B1.1010105@adamstudios.com> <4220AC5C.7040403@pyramus.com> Date: Sat, 26 Feb 2005 20:44:26 +0100 (CET) From: "Randy Adamczyk" To: "Blake Swensen" User-Agent: SquirrelMail/1.4.4 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal X-Virus-Scanned: amavisd-new at adamstudios.com cc: freebsd-isp@freebsd.org Subject: Re: Why the mail error for domains I don't host? X-BeenThere: freebsd-isp@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Internet Services Providers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 26 Feb 2005 19:44:33 -0000 hi, On Sat, February 26, 2005 6:05 pm, Blake Swensen said: > I am configured that way. The errors I reported were in the syslog. Are > you suggesting that I remove the localhost entry from sendmail.cw? no, i guess you use relay_based_on_MX, right? i usually recommend not using that. i don't know your setup and how many domains you are hosting, but if you configure sendmail to accept mail sent to the domains you are hosting instead of relying on MX records that _others_ are in control of, you won't be vulnerable to this sort of thing anymore. if this solution isn't feasible for you, then you could at least reject all mail from domains whose MX points to localhost. google around for "sendmail mx 127.0.0.1 reject" or something and you should find a solution. hope this helps, randy