If you're printing text vertically on horizontal fed envelopes, the most likely cause is a feeder mismatch
fnaf between your printer and the envelope feeders. The feeder is the device that feeds paper into your printer, which may be different from
framed game your printer’s paper width. In some cases, the feeder may not match the width of the envelope because of some minor differences in physical dimensions. When printing text on horizontal fed envelopes, you'll see an error message "No Feed Paper" or "Paper Width Not Supported".