Yes. Your campaign and email is automatically saved as you move through Campaigns steps 1-8. You can save at any time by clicking Save My Changes at the top right of any Campaigns page. You can return to Step 8 Schedule & Send at any time to send the email.
Important Note: When returning to the email make sure to verify the Sales Date Range, on Campaign/Step 8, to ensure sales are attributed to the correct date range. Click here for additional information about the sales dates range.