graymail

Etymology
From + : in the threat sense, by analogy with.

Noun

 * 1)  The threatened exposure of state secrets in order to manipulate legal proceedings.
 * 2)  Email that is not technically spam (since the user agreed to receive it) but which is unwanted, such as newsletters after making a purchase.

Related terms

 * see

Verb

 * 1)  To threaten exposure of state secrets in order to manipulate legal proceedings.