Currently there are only 2 ways to get the contact information from a Sendout,
Temporary Contact:
These can be exported before the send out is sent within the Contacts section
Select Export Contacts, Temporary Contacts. (This will export a list of Temporary contacts only so they can be added to the Contacts Database at a later date)
You cannot export a full list from the Contacts section
Tracking Sheet:
This is only available once the Send out has been issued.
Select Tracking, Export, Basic/Summary.(each option will give you a list of contacts sent to)