From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-2.1 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 2295 invoked from network); 10 Apr 2021 17:42:11 -0000 Received: from mx1.math.uh.edu (129.7.128.32) by inbox.vuxu.org with ESMTPUTF8; 10 Apr 2021 17:42:11 -0000 Received: from lists1.math.uh.edu ([129.7.128.208]) by mx1.math.uh.edu with esmtps (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lVHcX-00GTuc-QH for ml@inbox.vuxu.org; Sat, 10 Apr 2021 12:42:09 -0500 Received: from localhost ([127.0.0.1] helo=lists.math.uh.edu) by lists1.math.uh.edu with smtp (Exim 4.94) (envelope-from ) id 1lVHcX-006qGQ-87 for ml@inbox.vuxu.org; Sat, 10 Apr 2021 12:42:09 -0500 Received: from mx2.math.uh.edu ([129.7.128.33]) by lists1.math.uh.edu with esmtps (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lVHcV-006qGG-6i for ding@lists.math.uh.edu; Sat, 10 Apr 2021 12:42:07 -0500 Received: from quimby.gnus.org ([95.216.78.240]) by mx2.math.uh.edu with esmtps (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lVHcS-00GF5I-RY for ding@lists.math.uh.edu; Sat, 10 Apr 2021 12:42:06 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:To:From:Sender:Reply-To:Cc:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=t0Odm5NAqcCV7gyzo4CVEHqUB5g+kDWbpWFoEpWPbI4=; b=SeDzkNOOZyYPBkJ+glCnVQbZd+ mxBRMNN9qEWjmothVuA/AObfep4NGRsY8Q8Mm1pg5S1IL+q2PF3TjvacJkxmCH40A8AbnbPxJ1E/V YsmjQrZK5xBF8HmJxOkFRPeSPfuajTvetBV8zO4cwd0LKCBZmxivlHW5wGvvXA50b7tE=; Received: from mail-out.m-online.net ([212.18.0.9]) by quimby.gnus.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lVHcK-0006rI-Qz for ding@gnus.org; Sat, 10 Apr 2021 19:42:00 +0200 Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4FHj435ScVz1qs3t for ; Sat, 10 Apr 2021 19:41:55 +0200 (CEST) Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 4FHj435Bblz1qsXd for ; Sat, 10 Apr 2021 19:41:55 +0200 (CEST) X-Virus-Scanned: amavisd-new at mnet-online.de Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id Ek5EgCVDetGB for ; Sat, 10 Apr 2021 19:41:55 +0200 (CEST) X-Auth-Info: FhYhod4Rw03AfUITvnzaDMjFKkUdVHLCNGhPqdDp9NbUY+pFfoNQWLCmaVPK/TJx Received: from igel.home (ppp-46-244-178-21.dynamic.mnet-online.de [46.244.178.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA for ; Sat, 10 Apr 2021 19:41:55 +0200 (CEST) Received: by igel.home (Postfix, from userid 1000) id 77BC72C374E; Sat, 10 Apr 2021 19:41:54 +0200 (CEST) From: Andreas Schwab To: ding@gnus.org Subject: Re: empty Followup-to: header References: <87k0pafdbs.fsf@zoho.eu> X-Yow: PEGGY FLEMING is stealing BASKET BALLS to feed the babies in VERMONT. Date: Sat, 10 Apr 2021 19:41:54 +0200 In-Reply-To: <87k0pafdbs.fsf@zoho.eu> (Emanuel Berg's message of "Sat, 10 Apr 2021 16:01:43 +0200") Message-ID: <87fszy595p.fsf@igel.home> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain List-ID: Precedence: bulk On Apr 10 2021, Emanuel Berg wrote: > o/ can I have an empty Followup-to: header? RFC5536 doesn't allow that. See also RFC1122. Andreas. -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."