No. You can use either the recipient's email address or bitcoin address to send bitcoin to them from your Coinapult wallet.
Funds sent to an email address will be sent to the Coinapult account associated with that email address, if the user already exists. If there is no Coinapult account associated with that email address, then Coinapult automatically creates a new account associated with that email address. The recipient is automatically notified at this email address that they have recently received bitcoin and how to claim the funds.
If the recipient wishes to claim the funds using a non-Coinapult wallet or account, they will need to provide you, the sender, with a bitcoin address at which they would like to receive the funds.
They can create a bitcoin address using the Coinapult wallet or any other bitcoin wallet service or software.