When you negotiate with your leads in Pitchbox, you can choose to send your communication immediately, or to schedule your reply for any time in the future.
After typing out your message, click on the dropdown next to the 'Send' button and select 'Schedule'.
Select the day and time you want your email to be sent, and click 'Schedule & Send'.
Pitchbox is set by default to automatically cancel your scheduled email if there is an inbound reply from the opportunity.
To access your Scheduled Emails, go to your All Emails folder, and select 'Scheduled Replies' in the drop-down.