I've been fielding a lot of questions lately about delivery. Sometimes the askers of these questions really mean deliverability. I take a deep breath, keeping in mind that most of the uninitiated still think they are the same thing, harmonize my chakras, and calmly correct them and help them ask the right questions. Let's start this brief diatribe, and I promise to be as succinct as possible, with a few definitions:

Delivery: the act of delivering something. In this case, it's the act of delivering email.

Deliverability: the act of specifically delivering email to the inbox versus the spam folder versus having it blocked outright for various violations or offenses.