Postcard campaign service providers with dynamic fields

[Mark Costa]

I recently tried using REIPro to identify owners of multifamily apartment complexes in my area. I like how you can easily order postcards from the lists available included in the service. However, the postcards are pretty generic so I thought I would order my own cards to be sent out. I found a few sites that will mail the cards out to a list, but I want to take it one step further and dynamically add text. Specifically, I want each postcard to list the street address of the property I am interested in, similar to what REIPro does.  Does anyone know of such a service?