On 22 Apr 2016 at 16:04, Phil Pugliese (via tml list) wrote:

> This email was sent from yahoo.com which does not allow forwarding of emails via email lists. Therefore the sender's email address (xxxxxx@yahoo.com) has been replaced with a dummy one. The original message follows:
>
>
> --------------------------------------------
> On Fri, 4/22/16, Andrew Long <xxxxxx@mac.com> wrote:
>
>  Subject: Re: [TML] Please stop breaking threads!
>  To: xxxxxx@simplelists.com
>  Date: Friday, April 22, 2016, 8:46 AM
>
>  On 22 Apr 2016, at 01:32,
>  Phil Pugliese (via tml list) wrote:
>  >
>  > Dude, I'm using Yahoo's email
>  client.
>  > I just hit 'reply'
>  & it goes from there...
>  > If
>  there's a problem there, please direct your inquiries to
>  Yahoo...
>
>  Phil
>
>  I got the impression from one
>  of your posts earlier in the week that you get the TML in
>  digest, and you were replying to (part of) a digest. Is this
>  correct? If so, I'd imagine that the
>  'References:' headers may be stripped as part of the
>  digesting.
>
>  Regards, Andy
>  -------------------------------------------------------------------------------------
>
> Quite some back I somehow wound up in digest mode but that's been a few years ago.
> I've been in 'individual msg' mode since then.
>
> Here's what I do;
>
> Go to Yahoo.com
> Click on 'Email'
> Click on 'Inbox'
> start reading email
> If I wish to reply, I click on 'Reply'
> If I wish to originate an email, I click on 'Compose'
> In either case, when done, I click on 'Send'
>
> Since I'm working completely w/i yahoo's website, I can't imagine it getting any more generic than that.
>
> IMO, the problem is something related to the problems/features that Leonard has posted about.

Nope.

It's yahoo or the list 's yahoo kludge breaking the rules for email
headers.

Here are the relevant lines from the message you replied to:

From: Andrew Long <xxxxxx@mac.com>
In-reply-to:
<xxxxxx@mail.yahoo.com>
Message-id: <xxxxxx@mac.com>
References:
<xxxxxx@mail.yahoo.com>
 <xxxxxx@mail.yahoo.com>

Here are the relevant lines lines from your reply:

Message-ID:
<xxxxxx@mail.yahoo.com>
Subject: Re: [TML] Please stop breaking threads!
References:
<xxxxxx@mail.yahoo.com>
From: "Phil Pugliese (via tml list)" <xxxxxx@simplelists.com>

Note the lack of an "In-reply-to" line in yours. and that his
messages ID isn't in your references line.

*That* is what's breaking the threading.

I'm going to send a test message to a yahoo account I have and reply,
and see what the headers look like. that'll show wherher it's the
list's kludge or yahoo that's messing things up.

Ok, I sent a message from gmail to yahoo. Headers as received at
yahoo:
From: xxxxxx@gmail.com
To: xxxxxx@yahoo.com
Date: Fri, 22 Apr 2016 10:25:00 -0700
Subject: thread check
Message-ID: <xxxxxx@shadow97218.gmail.com>

Headers for the reply as received at gmail:
Date: Fri, 22 Apr 2016 17:31:57 +0000 (UTC)
From: Leonard Erickson <xxxxxx@yahoo.com>
Reply-To: Leonard Erickson <xxxxxx@yahoo.com>
To: "xxxxxx@gmail.com" <xxxxxx@gmail.com>
Message-ID:
<xxxxxx@mail.yahoo.com>
In-Reply-To: <xxxxxx@shadow97218.gmail.com>
References: <xxxxxx@shadow97218.gmail.com>
Subject: Re: thread check

Ok, yahoo isn't breaking the references or in-reply-to.

I'll subscribe my yahoo and gmail addresses to the list and see what
the headers show about this and about the DMARC/DKIM issue.

--
Leonard Erickson (aka shadow)
shadow at shadowgard dot com