A bump. Most rendering problems are solved but one of them and the reason for this thread creation is not and I just received one of those.
It happens with e-mails send by Apple Mail client:
Mime-Version: 1.0 (Mac OS X Mail 16.0 (3731.600.7))
X-Mailer: Apple Mail (2.3731.600.7)
It happens when there are attachments. The rendering result is a "missing" reply text when viewing the message unless manually changing to text only rendering. Don't use any other client so I can only say that gmail web mail does render these e-mail fine.
For the e-mail message received today I have a reply only seen in text only mode:
8a3044a3-9d55-4644-9ee7-aebb9eeff00d-image.png
All those lines above are are lost on HTML rendering and only afterwards does the content star including most of the signature and the quoted part of the message.
As I said I can see the relevant text by changing to text only mode but it is annoying.