From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Achim Gratz Newsgroups: gmane.emacs.devel Subject: Re: SMTP server error message Date: Sat, 31 May 2014 16:16:33 +0200 Organization: Linux Private Site Message-ID: <8738fq58zi.fsf@Rainer.invalid> References: <83mwdydqcs.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1401545828 25066 80.91.229.3 (31 May 2014 14:17:08 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 31 May 2014 14:17:08 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat May 31 16:17:02 2014 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Wqk5l-0005HJ-2M for ged-emacs-devel@m.gmane.org; Sat, 31 May 2014 16:17:01 +0200 Original-Received: from localhost ([::1]:59920 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wqk5k-0005uW-FT for ged-emacs-devel@m.gmane.org; Sat, 31 May 2014 10:17:00 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:45325) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wqk5c-0005uO-8v for emacs-devel@gnu.org; Sat, 31 May 2014 10:16:58 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Wqk5W-0007SH-15 for emacs-devel@gnu.org; Sat, 31 May 2014 10:16:52 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:54423) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wqk5V-0007S0-Qs for emacs-devel@gnu.org; Sat, 31 May 2014 10:16:45 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Wqk5U-00053W-Ow for emacs-devel@gnu.org; Sat, 31 May 2014 16:16:44 +0200 Original-Received: from pd9eb0fc0.dip0.t-ipconnect.de ([217.235.15.192]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 31 May 2014 16:16:44 +0200 Original-Received: from Stromeko by pd9eb0fc0.dip0.t-ipconnect.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 31 May 2014 16:16:44 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 35 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: pd9eb0fc0.dip0.t-ipconnect.de User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.91 (gnu/linux) Cancel-Lock: sha1:h2QyLvDv4wyXJxM4cbBE19O8xkY= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:172216 Archived-At: Eli Zaretskii writes: > Since about a couple of days ago, some of the messages I send via > smtpmail fail because the SMTP server sends this response, after the > message is sent to it: > > 451 4.0.0 Spam filter end message failed - server - license [slot 1] The 451 repsonse means there has been an error on the server while processing the message and the pending action has been aborted. > When this response comes in, smtpmail bails out. This only happens > with about 25% probability, and in particular if I immediately resend, > the message is sent with no problems. You might be talking to an address that uses load-balancing over multiple servers and only one of those has a problem. Another possibility is that whatever is doing the spam filtering doesn't respond (quickly enough). > What does that response mean, and what can I do to avoid it (apart of > hacking smtpmail)? Getting a 451 means, "Sorry, didn't work out this time. Come back later if you still want to." Most SMTP servers would now enter exponential backoff for re-delivery attempts, most MTA will simply bow out and let the user handle the problem. Regards, Achim. -- +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+ Wavetables for the Terratec KOMPLEXER: http://Synth.Stromeko.net/Downloads.html#KomplexerWaves