Lexmark MS810n / MS810dn / MS810dtn
Load paper properly
Allow the paper to enter the optional mailbox bins properly
Note: If the paper is not under the bin arm, then a jam occurs due to an overfilled bin.
Use recommended paper
Multiple 451.05 or 459.05 Paper Jams when Using Lightweight Media
Identifying Causes of Paper Jams in the Hole Punch Unit (HPU)