Answer:
Draft
Step-by-step explanation:
Draft is a specific folder in email that is meant to store partially finished mails and mails which has been created but is not sent . Draft folders helps in reducing rework on the mail if one is interrupted while writing the mail. Another purpose of draft folder was that if anyone accidentally closes the mail writing section then the content of mail is not lost and can be easily be obtained in draft folder. It also helps in tracking unsent and unfinished mail for the user.
Since, message written by Alexa is saved at different points but is not sent then if the mail is to be sent, then one needs to look for that mail in Draft folder.