Yes, sigh, I know, again. 1.7 breaks the workaround we had for Mac Mail threading, namely always including “Re:” at the start of the subject Setting for email subject Re: [%{site_name}] %{optional_pm}%{topic_title} Unfortunately, Discourse 1.7 sensibly does not include an “In-Reply-To” on the fir…

The logic was flawed… Hopefully I got it right this time :blush: https://github.com/discourse/discourse/commit/82555ca7612e497df31f9f4fc6969049a9887988 @peternlewis , can you let me know if it works for you?

Mac Mail Threading

Support

Topic		Replies	Views
Threading broken in Apple Mail on the Mac and in iOS Support	4	1377	June 21, 2019
Message threading in Mail.app Support	7	2325	February 9, 2016
Discourse Emails not threaded properly in some Email clients Support	12	5018	December 3, 2016
Email notifications not grouping nicely in Mail.app Feature	11	3483	October 14, 2015
Threading for email-only topics seems broken Support	4	1298	November 9, 2017

Mac Mail Threading

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