Date: Thu, 12 Jan 2017 10:36:32 -0800 From: Karl Young <karly@kipshouse.org> To: Gary Aitken <freebsd@dreamchaser.org> Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: ramifications of tweaks to subject line Message-ID: <20170112183632.GP26386@mailboy.kipshouse.net> In-Reply-To: <f060a49f-cf3a-3d5b-9344-e1c207d261b0@dreamchaser.org> References: <f060a49f-cf3a-3d5b-9344-e1c207d261b0@dreamchaser.org>
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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
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