Question

setting your __________ will prevent you from having to type your name in every email. autograph designation name signature

Explanation:

In email settings, a "signature" is a predefined block of text (which can include one's name) that is automatically appended to the end of every email. An "autograph" is more related to a hand - written signature in a personal or collectible sense. A "designation" refers to a title or position. And if it were "name", it would be redundant as the sentence already mentions not having to type the name.

Answer:

signature