I'm an 8 Letter Word (12345678)

I'm an 8 letter word (12345678).
I'm very smart and can be dangerous.
My 78 is d name of an animal,
Farmers pray for my 2345,
U can keep stuffs in my 678,
My 45678 is d message u received.
Ladies can't do without my 123 and
U can Neva be intelligent without my 12345.
What am I??

Click here for Answer

Answer is BRAINBOX
1 Ox
2 Rain
3 Box
4 Inbox
5 Bra
6 Brain