Sorry I should have been more clear. what I’m seeing is a user replying to an existing private post via email (post has the topic id 18192) with these headers:
18192 is a private post to which this user got an answer, he replied to the from address (instead of the reply-to address annoyingly). It created a new private post nr 18217.
X-Sieve: CMU Sieve 3.0
X-Spam-hits: HTML_MESSAGE 0.001, ME_BETA_RULES 0.01, RCVD_IN_DNSWL_NONE -0.0001,
SPF_PASS -0.001, LANGUAGES en, BAYES_USED none, SA_VERSION 3.4.2
X-Spam-charsets: plain='utf-8', html='utf-8'
To: RemObjects <email@example.com>
Subject: AW: [RemObjects Talk] [RemObjects Support] Water
Thread-Topic: [RemObjects Talk] [RemObjects Support] Water
Date: Fri, 14 Dec 2018 09:21:55 +0000
Accept-Language: de-DE, en-US
my understanding was, that discourse takes in account the In-Reply-To field too, to match up the post to the original thread (in addition to the reply-to field used as To).
What I expected to happen is that it added it to the original topic, not a new one. Whats the best approach for me to diagnose this if that is what should have happened?