RFC 7504 on SMTP 521 and 556 Reply Codes

rfc-editor@rfc-editor.org Tue, 30 June 2015 23:36 UTC

Return-Path: <wwwrun@rfc-editor.org>
X-Original-To: ietf-announce@ietfa.amsl.com
Delivered-To: ietf-announce@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 082E31B29F0 for <ietf-announce@ietfa.amsl.com>; Tue, 30 Jun 2015 16:36:09 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -101.912
X-Spam-Level:
X-Spam-Status: No, score=-101.912 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_WHITELIST=-100] autolearn=ham
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 00peej8n5AP3 for <ietf-announce@ietfa.amsl.com>; Tue, 30 Jun 2015 16:36:07 -0700 (PDT)
Received: from rfc-editor.org (rfc-editor.org [IPv6:2001:1900:3001:11::31]) by ietfa.amsl.com (Postfix) with ESMTP id 2C69D1B29B3 for <ietf-announce@ietf.org>; Tue, 30 Jun 2015 16:36:07 -0700 (PDT)
Received: by rfc-editor.org (Postfix, from userid 30) id 16E30180092; Tue, 30 Jun 2015 16:32:56 -0700 (PDT)
To: ietf-announce@ietf.org, rfc-dist@rfc-editor.org
Subject: RFC 7504 on SMTP 521 and 556 Reply Codes
X-PHP-Originating-Script: 1005:ams_util_lib.php
From: rfc-editor@rfc-editor.org
Message-Id: <20150630233256.16E30180092@rfc-editor.org>
Date: Tue, 30 Jun 2015 16:32:56 -0700 (PDT)
Archived-At: <http://mailarchive.ietf.org/arch/msg/ietf-announce/xFR3CFsigdcqg__pmUpby7g0_e8>
Cc: drafts-update-ref@iana.org, rfc-editor@rfc-editor.org
X-BeenThere: ietf-announce@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
Reply-To: ietf@ietf.org
List-Id: "IETF announcement list. No discussions." <ietf-announce.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ietf-announce>, <mailto:ietf-announce-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ietf-announce/>
List-Post: <mailto:ietf-announce@ietf.org>
List-Help: <mailto:ietf-announce-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ietf-announce>, <mailto:ietf-announce-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 30 Jun 2015 23:36:09 -0000

A new Request for Comments is now available in online RFC libraries.

        
        RFC 7504

        Title:      SMTP 521 and 556 Reply Codes 
        Author:     J. Klensin
        Status:     Standards Track
        Stream:     IETF
        Date:       June 2015
        Mailbox:    john-ietf@jck.com
        Pages:      7
        Characters: 13936
        Updates:    RFC 1846, RFC 5321

        I-D Tag:    draft-klensin-smtp-521code-07.txt

        URL:        https://www.rfc-editor.org/info/rfc7504

        DOI:        http://dx.doi.org/10.17487/RFC7504

This memo defines two Simple Mail Transfer Protocol (SMTP) reply
codes, 521 and 556.  The 521 code was originally described in an
Experimental RFC in 1995 and is in wide use, but has not previously
been formally incorporated into SMTP.  The 556 code was created to
support the new tests and actions specified in RFC 7505.  These codes
are used to indicate that an Internet host does not accept incoming
mail at all.  This specification is not applicable when the host
sometimes accepts mail but may reject particular messages, or even
all messages, under specific circumstances.

This is now a Proposed Standard.

STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the 
standardization state and status of this protocol.  Distribution of this 
memo is unlimited.

This announcement is sent to the IETF-Announce and rfc-dist lists.
To subscribe or unsubscribe, see
  https://www.ietf.org/mailman/listinfo/ietf-announce
  https://mailman.rfc-editor.org/mailman/listinfo/rfc-dist

For searching the RFC series, see https://www.rfc-editor.org/search
For downloading RFCs, see https://www.rfc-editor.org/rfc.html

Requests for special distribution should be addressed to either the
author of the RFC in question, or to rfc-editor@rfc-editor.org.  Unless
specifically noted otherwise on the RFC itself, all RFCs are for
unlimited distribution.


The RFC Editor Team
Association Management Solutions, LLC