one more interesting spam

I read another interesting spam email, from

I write to seek your assistance for safe keeping of two military trunk boxes valuable that will be of great benefit to both of us; I will explain further when you respond to my direct Email:  captcaseythoreen@r7.com Capt Casey Thoreen.
US ARMY IN AFGHANISTAN.

Why is a Captain in Afghanistan using the mailbox of r7 in Brasil?
Trust me, I won't contact you.