Color LaserWriter 12/600: No Support for Envelopes

Can I print envelopes on my Color LaserWriter 12/600 PS printer?
Apple does not support the printing of envelopes or labels on the Color LaserWriter 12/600 PS printer. On page 203 of the Color LaserWriter 12/600 PS User's Guide, it states that doing so could cause damage to the printer.
Published Date: Feb 19, 2012