Sorry, but this plugins seems to guess TLS connections to be active. I checked my actual/ old emails with faces (which are hard to differentiate) and their popup information and many emails without TLS notification in headers between mail servers were still marked as "Perfect - no known email providers and encryption between all hops" ??? Like this not too old email where you can yourself also subscribe/verify this behavior:
Received: from mail7.atl51.rsgsv.net ([184.108.40.206]) by mx-ha.gmx.net (mxgmx011 [220.127.116.11]) with ESMTP (Nemesis) id 0LzGiX-1ffutS1fov-014QEI for <...@gmx.de>; Wed, 10 Oct 2018 21:14:15 +0200 Received: from mail7.atl51.rsgsv.net ([18.104.22.168]) by mx-ha.gmx.net (mxgmx011 [22.214.171.124]) with ESMTP (Nemesis) id 0LzGiX-1ffutS1fov-014QEI for <...@gmx.de>; Wed, 10 Oct 2018 21:14:15 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; s=k1; d=divx.com; h=Subject:From:Reply-To:To:Date:Message-ID:List-ID:List-Unsubscribe: Content-Type:MIME-Version; firstname.lastname@example.org; bh=hKFncKmjznI7eWjYuebk14QtFUlkgSq0GCHGsM0zGWo=; b=vr0HxyIJQVxudic78n62DFvEHXSnDXTtCKKYj8/EnmybQU5DhkVSqAh6hFiYL41LBM3LyRM219E1 4DrO4kVNxGqThmurSW1dmNvbW2rCMRMJm38l/rVeyfrHAuyD2pteJfeihRsmi0U9cfSFQYaubAQT g2hcJZGQOMPq2HeYEEI= Received: from (127.0.0.1) by mail7.atl51.rsgsv.net id hnp7oe2ddl4t for <...@gmx.de>; Wed, 10 Oct 2018 17:08:37 +0000 (envelope-from <bounce-mc.us18_93722225.221041-...=email@example.com>) Subject: =?utf-8?Q?Thank=20you=20=2D=2D=20get=2025%=20off=20DivX=20Pro=21=C2=A0?= From: =?utf-8?Q?DivX=20News?= <firstname.lastname@example.org> Reply-To: =?utf-8?Q?DivX=20News?= <email@example.com>
=> ESMTP usage isn't ESMTPS (or some TLS written headers) => DKIM signature is no encryption - only origin proove !
EDIT:/Answer - yes, sorry forgot to write it initially: latest Thunderbird: 60.4.0 running with Windows 10 - latest version
The addon is very small and simple with no configuration options. Adding a settings screen is way more free work than I'd like to put into this software, but if someone happens to develop this feature, I'll be happy to merge it.
5 stars because I can't give more than 5. I was searching for this because I want to know how protected my emails are. When I found this I was thrilled. And it works just as it describes and does just what is needed. Great job! Thank you for creating this!!!
This review is for a previous version of the add-on (0.2.5).