From owner-freebsd-questions@freebsd.org Thu Jan 12 19:01:30 2017 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 95022CABF8C for ; Thu, 12 Jan 2017 19:01:30 +0000 (UTC) (envelope-from karly@kipshouse.net) Received: from mgmt.ironboy.kipshouse.net (ironboy.kipshouse.net [IPv6:2001:470:835a:4242::42]) (using TLSv1.2 with cipher RC4-SHA (128/128 bits)) (Client CN "mx.kipshouse.net", Issuer "Starfield Secure Certificate Authority - G2" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 440A21223 for ; Thu, 12 Jan 2017 19:01:30 +0000 (UTC) (envelope-from karly@kipshouse.net) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=kipshouse.org; i=@kipshouse.org; q=dns/txt; s=kh-ss; t=1484247691; x=1515783691; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; z=Date:=20Thu,=2012=20Jan=202017=2010:36:32=20-0800|From: =20Karl=20Young=20|To:=20Gary=20Aitk en=20|Cc:=20FreeBSD=20Mailing=20 List=20|Subject:=20Re:=20r amifications=20of=20tweaks=20to=20subject=20line |Message-ID:=20<20170112183632.GP26386@mailboy.kipshouse. net>|References:=20|MIME-Version:=201.0|In-Reply-To:=20; bh=v9OTlphR+S0Ea+HU/6s/pC2dNRExKfbggPi3RFhWG8g=; b=tUv3CO2vttPqVIg6R0ySclPcRMVVo4alFlaKnFR2MlEPDwRzku0SMqC2 pfYHs/MwkwNdh6ZuIu44MrMK51F0HEF+VibebNvOeYe54Qy7AIT4yvji+ Aay5tMV8wjNl1DP+bpZ7lOZRc3meldbu9mpTuuDgZgZ3GxmR1mo7Ha0lx qiFmLAg8dinV0joq6PGA03FVsRXEs9DN4q9HU7rgkf6W4gW0Ik2voO4wW rkeja9v22NHnEYHB14FSUrMrip/xKXpPVSuqL439abn4g51V8kjuESMyR HsCOoMpBGb+eY9F5mWh8ELurXpkmR2NeOgdirOe/G1XnK1DKqmNvKwZsr w==; Authentication-Results: d2.ironport.kipshouse.net; dkim=none (message not signed) header.i=none; spf=None smtp.pra=karly@kipshouse.org; spf=None smtp.mailfrom=karly@kipshouse.net; spf=None smtp.helo=postmaster@mailboy.kipshouse.net Received-SPF: None (d2.ironport.kipshouse.net: no sender authenticity information available from domain of karly@kipshouse.org) identity=pra; client-ip=2001:470:835a:1010::26; receiver=d2.ironport.kipshouse.net; envelope-from="karly@kipshouse.net"; x-sender="karly@kipshouse.org"; x-conformance=sidf_compatible Received-SPF: None (d2.ironport.kipshouse.net: no sender authenticity information available from domain of karly@kipshouse.net) identity=mailfrom; client-ip=2001:470:835a:1010::26; receiver=d2.ironport.kipshouse.net; envelope-from="karly@kipshouse.net"; x-sender="karly@kipshouse.net"; x-conformance=sidf_compatible Received-SPF: None (d2.ironport.kipshouse.net: no sender authenticity information available from domain of postmaster@mailboy.kipshouse.net) identity=helo; client-ip=2001:470:835a:1010::26; receiver=d2.ironport.kipshouse.net; envelope-from="karly@kipshouse.net"; x-sender="postmaster@mailboy.kipshouse.net"; x-conformance=sidf_compatible X-SBRS: None X-MID: 231319 X-RemoteIP: 2001:470:835a:1010::26 X-RemoteHost: 2001:470:835a:1010::26, mailboypriv.kipshouse.net X-IronPort-AV: E=McAfee;i="5700,7163,8406"; a="231319" Received: from mailboypriv.kipshouse.net (HELO mailboy.kipshouse.net) ([IPv6:2001:470:835a:1010::26]) by d2.ironport.kipshouse.net with ESMTP; 12 Jan 2017 11:01:30 -0800 Received: by mailboy.kipshouse.net (Postfix, from userid 500) id F24A943F91; Thu, 12 Jan 2017 10:36:32 -0800 (PST) Date: Thu, 12 Jan 2017 10:36:32 -0800 From: Karl Young To: Gary Aitken Cc: FreeBSD Mailing List Subject: Re: ramifications of tweaks to subject line Message-ID: <20170112183632.GP26386@mailboy.kipshouse.net> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Arbitrary-Number-Of-The-Day: 42 X-URL: http://www.kipshouse.org/karly X-Work-URL: http://www.cisco.com/ X-Disclaimer: My opinions do not necessarily represent those of my employer. User-Agent: Mutt/1.5.20 (2009-12-10) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Jan 2017 19:01:30 -0000 It depends on the MUA. I use Mutt, which uses the In-Reply-To header for threading, so changing the subject doesn't affect threading. I'm fairly certain that not all MUAs use this header, or even insert it. RFC2822 says: in-reply-to SHOULD occur in some replies - see 3.6.4 references SHOULD occur in some replies - see 3.6.4 -karl Gary Aitken(freebsd@dreamchaser.org)@2017.01.12 11:51:19 -0700: > Can someone summarize the ramifications of tweaking the subject line > in a post? > > Assume: > Some-original-subject > Normal reply yields: > Re: Some-original-subject > > If a reply is made and the subject line is (mistake, whatever) trashed, > then manually re-inserted, does > re: Some-original-subject > (change in case of Re) preserve threading? > Does change in case of words in subject line preserve threading? > More generally, what permutations of the original text still preserve > threading -- addition/deletion of various kinds of white-space, etc. > Is threading solely in the domain of the mail reader, or is there > something in the header besides the text of the header itself that > aids threading? > > If a subject digresses and one changes the subject line to > Re: New-subject (was: Some-original-subject) > is threading preserved? > > Thanks, > > Gary > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"