Re: Messages to +owner being wrongly routed to the whole group



... so it confirms the earlier experiments and points to the culprit
being btinternet or synchronoss.
And, following up with a similar case reported by another member I have evidence to implicate

Off-list Trista sent me the header for a misdirected message that posted into her group. In the following two Received fields note particularly the "for" clauses:

Received: from ([])
with ESMTP id
for <>; Wed, 4 Sep 2019 19:03:19 +0100
Received: from [redacted]-imac.home ([redacted)
by (5.8.337)
(authenticated as [redacted]
id 5D6FA3290010097D
for; Wed, 4 Sep 2019 19:03:19 +0100
The second is synchronoss saying that they received the message from the member's iMac, intended for the +owner address.

The first is btinternet saying that they received the message from synchronoss, intended for the group posting address.

I don't know for a fact about these two services, but I believe that servers generally record in the Received header very literally what they received. Which in this case would imply that synchronoss trimed the "+owner" off of the address after receiving it from the member's iMac and before delivering it to btinternet.

That's what I call a smoking gun.


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