The Fulfillment Services App will allow you to integrate your store with 3rd party dropshippers, such as Doba and Kole Imports. You can install it from the App Store on the left Nav Menu of your store.
Once you install the app, there will be an option to Create Custom Service. Begin by adding a name to identify your dropshipping partner. From here, you can choose whether to have the order emails be Automated or Manual and what email address the order notification email should go to. The dropshippers contact information can also be entered in the Contact Information section. You can get that information from the dropshipper you are working with.
Under Serviced Products at the bottom of the page, you can choose which products are attached to this dropshipper. If any of these products are purchased, the email will be sent to that dropshipper with those specific products and the shipping address for them to be sent to, so be sure all of the products from that dropshipper are chosen there.
Once you have done that, be sure to press the save button in the upper left of the section. If you go back into the app, you will be able to see the services you added, and add more from the plus icon in the upper right.