The Self-Delivery feature allows you to deliver proposals any way you like, while still providing the value of Analytics and Notifications. You can choose to deliver yourself on the delivery step by clicking the "I'll Deliver Myself" link on the proposal deliver step.
Once you click the "I'll Deliver Myself" option, you can then copy and deliver the proposal URL's to your recipient(s) however and whenever you like.
Keep in mind that if you have multiple recipients, you must send the URL to each individual recipient. If you hit Reply-All and send one link, all of the recipients will receive one link where the tracking will not be individualized.