Here ia 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 that the 26A print cartridge can print in 1 pass. Therefor it would need to print the top 1/2 then come back and print the bottom 1/2. The likelyhood of the the 2 halves matching up the way they should is not good!
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