that's not a list of options, the check boxes are under the "hide on launch" option for each item in the list.
With that window open, open a finder window and navigate to the Applications folder. Drag the mail application and drop it into the list to add it to the list.
...or click on the + sign.
The new Great Equalizer is the SEND button.
In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire
