> On Apr 22, 2016, at 10:39 AM, xxxxxx@shadowgard.com wrote:
>
>
> 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.

There are separate issues here:

1) threading is being broken by one or more email clients/servers out there. Not a lot that can be done here about that.

2) Email being delivered to spam, even when the address is whitelisted. That is strictly a server side issue. Yahoo, for example, does not publish a ‘spam score’ per se, like Spam Assassin or Barracuda does. Oh no! They have to have their own system which injects about 750 bytes of 'random characters that look like base64 encoding but aren’t’ into the headers. I cannot determine from that why they would consider one message spam and another from the same person on the same mailing list to be  ham.

Unfortunately neither issue can be solved by either me or simplelists.

DMARC/DKIM *may* be broken on some email *recipient’s* side but Simplelists does pass properly configured testing for that. I know that because we control our own email servers and I can check that directly. (and again, that should break every message from a particular sender/domain not just some of them, because it does not rely at all on message content)

If the recipient’s servers are misconfigured, all bets are off. DMARC/DKIM depends on both sides working correctly.

Welcome to the fun fun fun world of managing email systems. 8-/ Carrier pigeons are less hassle.

Hell entrusting documents to PC’s to deliver is less hassle :-)

I’m grateful it’s not a full-time job for me, or I’d be much grayer/balder/drunker than I usually am :-)

<https://media.giphy.com/media/12bVDtXPOzYwda/giphy.gif>

--
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs