The IESG has approved the following document: - 'Signalling one-click functionality for list email headers' (draft-levine-herkula-oneclick-04.txt) as Proposed Standard This document has been reviewed in the IETF but is not the product of an IETF Working Group. The IESG contact person is Alexey Melnikov. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-levine-herkula-oneclick/ Technical Summary An [RFC2369] email header field can contain HTTPS [RFC7230] URIs. In a List-Unsubscribe header field the HTTPS URI is intended to unsubscribe the recipient of the email from the list. But anti-spam software often fetches all resources in mail header fields automatically, without any action by the user, and there is no mechanical way for a sender to tell a request made automatically by anti-spam software from one manually requested by a user. To prevent accidental unsubscriptions, senders return landing pages with a confirmation step to finish the unsubscribe request that a live user would recognize and act on, but an automated system would not. This makes the unsubscription process more complex than a single click. This document has several goals. o Allow email senders to signal that a [RFC2369] List-Unsubscribe header field has One-Click functionality. o Prevent accidental unsubscriptions by issuing GET request on HTTPS URLs in the List-Unsubscribe header field. o Allow MUA users to unsubscribe from mailing lists in a familiar environment and without leaving the MUA context. A receiving system can process an unsubscription request in the background without further interaction, and know that it can be fully processed by the mail sender's system. Working Group Summary This is not a WG document, but the document was discussed on the DISPATCH mailing list. Document Quality At least two mail providers are planning to implement this specification. Permanent Header Field registration was performed by Graham Klyne. (Email thread to IESG starting on October 13th) Personnel The Document Shepherd for this document is Paul Kincaid-Smith. The responsible Area Director is Alexey Melnikov. RFC Editor Note In Section 5, please replace one ABNF production: OLD: ldh = ALPHA 0*(ALPHA | DIGIT | "-") NEW: ldh = ALPHA 0*(ALPHA / DIGIT / "-")
