What should I do if the ten minutes run out before I finish?
Complete the missing required item first, then close the email; and what to change if it keeps happening.
Switch from improving to completing. In the last minute, write the required item you have not covered as one direct sentence, then add a one-line closing and your sign-off. An email with a plain final sentence still addresses every task in the prompt, while a polished email that omits one requirement reads as incomplete, because the published criteria describe a missing or half-finished required task as falling short.
Then find the phase that overran. If reading regularly takes longer than 90 seconds, count the verbs in the directions before planning sentences, because each instruction is a task you have to cover. If drafting overruns, cut the plan to four sentences: greeting, answer, request, closing. If checking overruns, keep two checks only: every required item present, and every sentence with a subject and a verb. Shortening a phase is more useful than typing faster, because the ten-minute limit rewards coverage, not speed.