Mistakenly sending an email. Can be caused by forgetting an attachment, glaring grammatical errors, poor judgment, or overheated emotions.
"Save as draft" is the cure for PED (premature emailation disorder).
He responded to his coworker's criticism with a reply-all flame. The premature emailation cost him his job.
Without thinking it through, he sent his crush a mash note. After his premature emailation, she thinks he's psycho.