Check the following points to resolve the issue:
- Make sure envelopes are printed with the back cover (face-up output tray) opened.
- Make sure envelopes are fed only from the MP tray.
DCP-L5500DN, DCP-L6600DW, HL-L5000D, HL-L5050DN, HL-L5100DN(T), HL-L5200DW(T), HL-L6250DN, HL-L6300DW(T), HL-L6400DW(T), MFC-L5700DN, MFC-L5750DW, MFC-L6800DW(T), MFC-L6900DW(T), MFC-L6970DW
If you need further assistance, please contact Brother customer service:
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