======VPOP3.MarkMessageRead Lua function======

The [[management scripting|Lua management]] function 'VPOP3.MarkMessageRead' marks or unmarks a specified message as read.

  VPOP3.MarkMessageRead(username, folder, UID, read);

  * **username** is the username from [[VPOP3.GetUsers]]
  * **folder** is the folder from [[VPOP3.GetFolders]]
  * **UID** is the UID from [[VPOP3.GetMessages]]
  * **read** is true if the message is to be marked as read, or false if it is to be marked as unread