Custom Connector - Address

Hi, I'm building a push connector and I need the "message.address" to contain a specific recipient field.

I've created a schema for my deliveryMapping adding an attribute, also adding to the deliveryMapping form.

I've created a new deliveryMapping, targeting recipient, filling my new field with the information I need.

When I get to the deliveryPart, message.address is empty, and Address in the Broadlog Table is also empty.

Is there some specifics that I need to know about ? 

I've checked and my messageType is the correct channel. Information is being inserted into my custom broadlog table.

Thanks for your help about setting up a new connector