[rfc-dist] RFC 8689 on SMTP Require TLS Option
rfc-editor@rfc-editor.org Wed, 27 November 2019 19:57 UTC
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Date: Wed, 27 Nov 2019 11:57:23 -0800
Subject: [rfc-dist] RFC 8689 on SMTP Require TLS Option
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A new Request for Comments is now available in online RFC libraries. RFC 8689 Title: SMTP Require TLS Option Author: J. Fenton Status: Standards Track Stream: IETF Date: November 2019 Mailbox: fenton@bluepopcorn.net Pages: 16 Updates/Obsoletes/SeeAlso: None I-D Tag: draft-ietf-uta-smtp-require-tls-09.txt URL: https://www.rfc-editor.org/info/rfc8689 DOI: 10.17487/RFC8689 The SMTP STARTTLS option, used in negotiating transport-level encryption of SMTP connections, is not as useful from a security standpoint as it might be because of its opportunistic nature; message delivery is, by default, prioritized over security. This document describes an SMTP service extension, REQUIRETLS, and a message header field, TLS-Required. If the REQUIRETLS option or TLS-Required message header field is used when sending a message, it asserts a request on the part of the message sender to override the default negotiation of TLS, either by requiring that TLS be negotiated when the message is relayed or by requesting that recipient-side policy mechanisms such as MTA-STS and DNS-Based Authentication of Named Entities (DANE) be ignored when relaying a message for which security is unimportant. This document is a product of the Using TLS in Applications Working Group of the IETF. 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/retrieve/bulk 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 _______________________________________________ rfc-dist mailing list rfc-dist@rfc-editor.org https://www.rfc-editor.org/mailman/listinfo/rfc-dist http://www.rfc-editor.org