Here is a short list of popular printers that will not be able to print the new Intelligent Mail barcode (formerly known as the 4-State Customer Barcode)
Simple, the long bars are taller than the 26A print cartridge can print in 1 pass. Therefore it would need to print the top 1/2 then come back and print the bottom 1/2. The likelihood of the 2 lining up the way they should is not good!
Click here for Addressing Systems and call 866-430-2847