Emails that are scheduled to send in relation to recipient's time zones can move into an In-progress status.
If more than one time zone is represented for the recipients on a scheduled email, the email will go into an 'In-progress' status upon one time zone receiving the email.
Once all recipients have received the email, the email will move to a ‘Sent’ status.
To note, once an email has moved into an ‘In-progress’ status it cannot be edited.