From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1O4X8R-0001Zo-7u for garchives@archives.gentoo.org; Wed, 21 Apr 2010 10:26:23 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 28199E07B3; Wed, 21 Apr 2010 10:25:58 +0000 (UTC) Received: from mail-ww0-f53.google.com (mail-ww0-f53.google.com [74.125.82.53]) by pigeon.gentoo.org (Postfix) with ESMTP id D7068E07B3 for ; Wed, 21 Apr 2010 10:25:57 +0000 (UTC) Received: by wwb28 with SMTP id 28so1307560wwb.40 for ; Wed, 21 Apr 2010 03:25:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:to:subject:date :user-agent:cc:references:in-reply-to:mime-version:content-type :content-transfer-encoding:message-id; bh=n4iShzSG4rNDr2E+Ku6U9vZF1xx+LmfWw3/oxQrx/hU=; b=vjromQ7vzWniuONqMCPfzwBMGDzGdaz6k0q34FFIZ7Jkhz2GXKZBHkQ+rM+hPM+CMa EYqjH0qXmmSNB7MmMea/5lpMxsI8vMsesw0nDlscyzsQpIkYvMsKlHi86wJu1w5HHZ3t dncD+a+7hOE39VtBs4hN+uioeeiFsQMslG0jg= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:subject:date:user-agent:cc:references:in-reply-to :mime-version:content-type:content-transfer-encoding:message-id; b=P1LvCP4Xk5zI8dAciy+F5Futq6wRYJJAZtieoGMylRuWoT51dKhEFmoNGI3lmU6Xmn suzs6r2FdRhwjqt9K6qPbR7o0aJsa8eW/RAe4/t/hnDQ+Ld8E3d93fmXkZtsUsEUAfNp 7itfPKwdduTWespaPm6zGOedOqbaYfaYwfimM= Received: by 10.216.162.149 with SMTP id y21mr4835573wek.196.1271845557219; Wed, 21 Apr 2010 03:25:57 -0700 (PDT) Received: from nazgul.localnet (196-210-153-185-rrdg-esr-2.dynamic.isadsl.co.za [196.210.153.185]) by mx.google.com with ESMTPS id v59sm1726860wec.15.2010.04.21.03.25.55 (version=TLSv1/SSLv3 cipher=RC4-MD5); Wed, 21 Apr 2010 03:25:56 -0700 (PDT) From: Alan McKinnon To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Re: [OT] Setting up a fall back ISP SMTP in sendmail Date: Wed, 21 Apr 2010 12:22:42 +0200 User-Agent: KMail/1.13.2 (Linux/2.6.33-zen1; KDE/4.4.2; x86_64; ; ) Cc: Harry Putnam References: <87fx2qqg0f.fsf@newsguy.com> In-Reply-To: <87fx2qqg0f.fsf@newsguy.com> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201004211222.42858.alan.mckinnon@gmail.com> X-Archives-Salt: a6803b87-2a01-47ca-b408-485281b1e364 X-Archives-Hash: 00ffd712975e388173e086fd36fc8ef2 On Tuesday 20 April 2010 17:51:12 Harry Putnam wrote: > Grant Edwards writes: > > On 2010-04-20, Harry Putnam wrote: > >> About all the snipes concerning hacking sendmail.cf... I'm sure you > >> are all aware that any hacking needs to happen in sendmail.mc... then > >> let m4 sort out sendmail.cf. > > > > IOW, sendmail has a configuration file so incomprehensible that the > > configuration file needs a configuration file. > > Internet mail is quite complex, yes. This statement is the source of the confusion surrounding sendmail. Internet mail is not complex, it is stunningly simple: mail comes in, look up where it should go, send it there In between you might hand the message off to virus and spam scanners, you might look up an ACL before accepting it coming in, but those are all additives to find valid mail. Remove the additives, and you get the amazingly simple lookup table scheme described above. There isn't even an inherent difference between relays and final destination MTAs, they still send the mail somewhere. The difference is in the viewpoint of the sysadmin. -- alan dot mckinnon at gmail dot com