Fission mailed

I think you meant to type "fusion mailed"!

Fusion is a process in which two or more atomic nuclei combine to form a single, heavier nucleus. This process releases a large amount of energy, and it is the same process that powers the sun and other stars.

Fission, on the other hand, is the process in which an atomic nucleus splits into two or more smaller nuclei, releasing a large amount of energy in the process. This is the opposite of fusion, and it is the process that occurs in nuclear reactors and atomic bombs.

So, if you meant to type "fusion mailed", I'm not sure what that would mean! But if you meant to type "fission mailed", I'm not aware of any specific meaning or context for that phrase. Could you please provide more information or clarify what you meant?