From owner-freebsd-stable@FreeBSD.ORG Wed Oct 4 07:21:24 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3A43116A407 for ; Wed, 4 Oct 2006 07:21:24 +0000 (UTC) (envelope-from karsten_fuhrmann@cartoon-film.de) Received: from natreg.rzone.de (natreg.rzone.de [81.169.145.183]) by mx1.FreeBSD.org (Postfix) with ESMTP id 99C5F43D46 for ; Wed, 4 Oct 2006 07:21:23 +0000 (GMT) (envelope-from karsten_fuhrmann@cartoon-film.de) Received: from stern.cartoon-film.de (pD953525B.dip.t-dialin.net [217.83.82.91]) by post.webmailer.de (8.13.6/8.13.6) with ESMTP id k947LLNg007560 for ; Wed, 4 Oct 2006 09:21:21 +0200 (MEST) Received: from [192.168.0.149] ([192.168.0.149]) by stern.cartoon-film.de (8.13.6/8.13.4) with ESMTP id k947G8oE072324 for ; Wed, 4 Oct 2006 09:16:08 +0200 (CEST) (envelope-from karsten_fuhrmann@cartoon-film.de) Mime-Version: 1.0 (Apple Message framework v752.3) Content-Transfer-Encoding: 7bit Message-Id: Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed To: freebsd-stable@freebsd.org From: Karsten Fuhrmann Date: Wed, 4 Oct 2006 09:21:12 +0200 X-Mailer: Apple Mail (2.752.3) X-Virus-Scanned: ClamAV version 0.88, clamav-milter version 0.87 on stern.cartoon-film.de X-Virus-Status: Clean Subject: fetchmail -> sendmail problem 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: Wed, 04 Oct 2006 07:21:24 -0000 Hello, i have a problem with some strange spam emails, which lock up my email reception. The problem is the following : I am using fetchmail to download my email (from a pop3 server), and fetchmail passes the email to my local sendmail daemon who gives it to my local imap server (cyrus). This works fine. But sometimes i got a spam email, which has an unresolveable dns origin, and this makes my sendmail crazy in a way, that sendmail wants to resolve but gets a timeout (around 20s). In the meantime the fetchmail which is actualy waiting for sendmail to accept the message gets a timeout from the pop server where it is connected to. Because of that timeout fetchmail stops receiving email from pop server and tries again next time, but next time it will start with the same spam email again, and it all starts again, actually no more new mails will arrive until i delete this particular email from the pop server manually. Is there a way to tweak the timeout behavior of sendmail, or maybe even no dns resolve option for sendmail, or even better some way to tell fetchmail to use the idle command to keep the connectio to the pop server open ? Greetings, Karsten Fuhrmann Cartoon-Film Thilo Rothkirch System Administration phone: +49 30 698084-109 fax: +49 30 698084-29 email: karsten_fuhrmann@web.de