Bill Cole via Postfix-users wrote in <6595a7f0-83ed-4abf-9062-61dd6134f...@billmail.scconsult.com>: |On 2025-02-23 at 15:01:15 UTC-0500 (Sun, 23 Feb 2025 21:01:15 +0100) |Steffen Nurpmeso via Postfix-users <stef...@sdaoden.eu> |is rumored to have said: ... |> it. Anyhow. I wanted to ask for long why postfix does not |> support the RFC 9057 Author: header, | |I would think that it is because new headers aren't something a MTA |generally needs to specifically support. Quoting the RFC:
Postfix generates the From: header $ </dev/null sendmail $LOGNAME $ MXEXE -:/ -Squiet -Snoheader -RY 'P$;xit' [-- Message 2 -- 10 lines, 409 bytes --]: From stef...@kent.sdaoden.eu Sun Feb 23 22:55:59 2025 Return-Path: <stef...@kent.sdaoden.eu> X-Original-To: steffen Delivered-To: stef...@kent.sdaoden.eu Received: by kent.sdaoden.eu (Postfix, from userid 1000) id 5E8EF182751; Sun, 23 Feb 2025 22:55:59 +0100 (CET) Message-Id: <20250223215559.5e8ef182...@kent.sdaoden.eu> Date: Sun, 23 Feb 2025 22:55:59 +0100 (CET) From: steffen <stef...@kent.sdaoden.eu> Status: R So it did. | In effect, the From: field has become dominated by its role as a | handling identifier. The current specification augments this altered | use of the From: field by specifying the Author: field, which | identifies the original author of the message and is not subject to | modification by Mediators. | |As a "Mediator" I would expect that any MTA could and *should* do no |more than preserve the header if it exists, as it does with all headers |that are not subject to canonical or generic rewriting or explicitly |modified by header_checks. | |> as it fixes a miss that |> starts with DomainKeys, and goes on ever since, and reached the |> mountaintop of madness with the advent of DMARC. | |Which is also unsupported by Postfix, in that it demands a 3rd-party |add-on. | |What sort of "support" would you expect to see in a MTA? Submission, submission. RFC 2047 for all overlong / non-7-bit clean headers, RFC 2231 for overlong / non-7-bit clean parameters, MIME content-transfer-encoding 8-bit when i pipe 8-bit data as via echo hallöchen | sendmail $LOGNAME --End of <6595a7f0-83ed-4abf-9062-61dd6134f...@billmail.scconsult.com> --steffen | |Der Kragenbaer, The moon bear, |der holt sich munter he cheerfully and one by one |einen nach dem anderen runter wa.ks himself off |(By Robert Gernhardt) | |In Fall and Winter, feel "The Dropbear Bard"s pint(er). | |The banded bear |without a care, |Banged on himself for e'er and e'er | |Farewell, dear collar bear _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
