im working on that right now. just signed up on usps.com. trying to navigate the eddm stuff
I used it quite a bit last year. Make SURE your card meets the dimensions before you order thousands of them. I had PO that was easy to work with. Another one that wanted to give me some lip about it not being exactly to their dimensions. I let her know that another PO took the exact same card with no problem at all and would be more than glad to have some more of my money. Funny how all of the sudden those dimensions weren't that big of a deal.