Use envelopes that weigh from 20 to 25 lb (80 to 95 g/m2).
Some envelopes need margin settings to be set in the application. Make sure you do a test print first.
Do not use any of the following types of envelopes, as they will cause paper feed problems:
Envelopes that are of a baggy construction.
Envelopes that are embossed (have raised writing on them).
Envelopes that have clasps or staples.
Envelopes that are pre-printed on the inside.
You may occasionally experience paper feed problems caused by the thickness, size, and flap shape of the envelopes you are using.
Step 1: Load envelopes and post cards:
Before loading, press the corners and sides of the envelopes or post cards to make them as flat as possible.
If the envelopes or post cards are "double-feeding," put one envelope in the paper tray at a time.
Put envelopes or post cards into the paper tray with the address side down and the leading edge in first as shown in the illustration. With both hands, gently press and slide the paper side guides (1) and paper length guide (2) to fit the size of the envelopes or post cards.