The lost+found folder is a special UNIX folder created for a variety of reasons: Most often the lost+found folder is created after a forced shutdown or a power cut. The OS loses track of what was going on and instead of dumping any files or folders it has lost track of, it puts them in the lost+found folder.
It's not much to be concerned about , seeing as those are some old files they can probably be safely deleted.
It is not possible by default, but you can download a plugin for the Mail app. The plugin is called TruePreview. It is said that it supports OS X Mountain Lion and below, but I had it working on my Mavericks machine.
Anyway, here's the method:
- Quit the Mail app
- Download TruePreview (scroll down for latest versions) and run the
installer
- Launch Mail.app and open Preferences, click on the >> arrow and
select “TruePreview”
- Adjust the Mark as Read settings as desired
Have a read on this page and you'll find that there is a Terminal command that can be used to delay the Mark As Read setting. However, I'm not sure you can disable it completely.
defaults write com.apple.Mail MarkAsReadDelay 2
Here, 2 is a measurement of the number of seconds to delay.
defaults write com.apple.Mail MarkAsReadDelay
The above will just revert the setting back to its default state.
Alternatively, if you're okay with marking it as unread, an easier option would be to use a keyboard shortcut instead of manually marking as unread. The standard keyboard shortcut, which toggles “read” and “unread”, is cmd+shift+u. You can also go to System Preferences → Keyboard to customise your own keyboard shortcut.
Have a look, see which options takes you where, and stick with whatever is comfortable. Let me know if anything went wrong during the plugin installation (that is, if you did install it).
Best Answer
An easier approach would be to use the mutt command line client that will natively access
/var/mail/[username]without having to take extra steps for conversions and forwarding.This is easy with MacPorts or homebrew (you probably want only one of these managers installed)