We are aware of the issue with the badge emails resending to everyone, we apologise for the inconvenience - learn more here.
See https://www.dropboxforum.com/t5/Files-folders/Filenames-become-lowercase-when-attaching-from-DropBox-to-Mail/td-p/349737. Filenames should not become all lowercase when exporting a file from Drop...
I have the same issue on my iPhone 11 and so does my wife with her iPhone 8.
We dont use Files but only the Dropbox App for ios. The problem is that we need to attach multiple files to the same email trail thus cannot create a new email each time therefore we have to use email on the ios device and then attach and select file from Dropbox with the correct capital filename, but as soon as I hit sent it makes it lower case. When I do the same from any other app on the phone email leaves it in uppercase.
Please Dropbox, assist your loyal customers with this matter as we make use of this feature every day.