From owner-freebsd-questions@FreeBSD.ORG Sat May 23 09:14:48 2015 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id F3BA6531 for ; Sat, 23 May 2015 09:14:47 +0000 (UTC) Received: from smtp207.alice.it (smtp207.alice.it [82.57.200.103]) by mx1.freebsd.org (Postfix) with ESMTP id 8934716E0 for ; Sat, 23 May 2015 09:14:46 +0000 (UTC) Received: from soth.ventu (82.52.27.173) by smtp207.alice.it (8.6.060.28) (authenticated as acanedi@alice.it) id 547D8BAA1E112F55 for questions@freebsd.org; Sat, 23 May 2015 11:08:42 +0200 Received: from alamar.ventu (alamar.ventu [10.1.2.18]) by soth.ventu (8.15.1/8.14.9) with ESMTP id t4N98f8C080820 for ; Sat, 23 May 2015 11:08:42 +0200 (CEST) (envelope-from ml@netfence.it) Message-ID: <55604399.2070404@netfence.it> Date: Sat, 23 May 2015 11:08:41 +0200 From: Andrea Venturoli User-Agent: Mozilla/5.0 (X11; FreeBSD i386; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: questions@freebsd.org Subject: Troubles with sendmail Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 23 May 2015 09:14:48 -0000 Hello. Not sure if this is the right place to ask (maybe ports@? Sendmail's support? Cyrus IMAP mailing lists?). I'm experiencing a strange problem with an MX server (9.3 with sendmail+tls+sasl2+ldap-8.15.1_2) which uses the cyrusv2 mailer to store mail on another server (9.3 with cyrus-imapd23-2.3.18_10). This is what I think is the relevant part of sendmail's MC config file: > define(`CYRUS_MAILER_FLAGS',`A5@w') > define(`CYRUSV2_MAILER_FLAGS',`A5@w') > define(`confLOCAL_MAILER', `cyrusv2') > define(`CYRUSV2_MAILER_ARGS',`TCP [mail.localdomain] lmtp') > MAILER(`cyrusv2') From time to time some message is delayed and a warning bounce is generated with the following: > Deferred: Name server: mail.localdomain.: host name lookup failure Since this is utter nonsense (mail.localdomain is always resolvable), I investigated a bit and found out that what the above really means is that one of the recipient's domain (not *my* recipient) cannot be resolved. An example might clarify: _ a message is sent to user@mydomain.it and to user@otherdomain.it; _ of course it arrives at my server (MX for mydomain.it); _ but ir won't reach its mailbox (user@mydomain.it) since otherdomain.it does not resolve properly. I understand I'm sort of asking for a shot in the dark, but believe me, I've been hitting my head on this for a long time and I cannot understand what the cause may be. Of course I tried many searches on the web, but perhaps I cannot guess the correct terms to search for. Any idea? bye & Thanks av.