Date: Mon, 15 Apr 2024 08:33:05 +1000 From: Andrew Reilly <areilly@bigpond.net.au> To: freebsd-stable@freebsd.org Subject: What's happening to Sender: headers? Message-ID: <C608E59C-C231-493D-A744-E448BBB92C75@bigpond.net.au>
next in thread | raw e-mail | index | archive | help
Hi all, I can=E2=80=99t think of anywhere else to ask, but this knowledgeable = group is as likely as any to know what=E2=80=99s going on, I think. For years and years I=E2=80=99ve been able to filter all of my FreeBSD = mailing list messages into a separate FreeBSD inbox with a pair of = simple dovecot-sieve rules: if address :matches "Sender" "*owner@freebsd.org" { fileinto = "in.freebsd"; } elsif address :matches "Sender" "owner*@freebsd.org" { fileinto = "in.freebsd"; } (=E2=80=A6 and similarly for most of my other mailing lists). The = Sender header is (used to be) a reliable reflection of the envelope FROM = address, which reliably tied things to the email server sending the list = messages. On about the 11th or 12th of April, a significant chunk of FreeBSD = mailing list messages, including especially the git commit messages, = started showing up in my normal INBOX, evading the filter rules. Over the weekend I got around to investigating, and discovered that the = errant messages don=E2=80=99t _have_ a Sender: header. There=E2=80=99s = a Return-Path: header that captures the envelope-from, but I haven=E2=80=99= t figured out how to make sieve check that yet: it doesn=E2=80=99t seem = to like it. Sieve documentation is spectacularly inconclusive, but I = suspect that the envelope extension might do what I want, but that=E2=80=99= s not really my question. Does anyone know why the Sender: header, which used to be so reliable = that I had thought it an intrinsic part of the SMTP/MTA ecosystem, has = gone away, or is at least not ubiquitous? I=E2=80=99m running dovecot and pigeonhole and postfix from ports, on = stable/14 and feeding messages in using fetchmail rather than direct = SMTP: I=E2=80=99ve found that exposing an SMTP endpoint requires more = anti-spam fu than I've been prepared to muster so far. Using fetchmail = is clunky but it keeps me behind my ISP=E2=80=99s spam filter. Cheers, Andrew
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?C608E59C-C231-493D-A744-E448BBB92C75>