cupsreject instructs the printing system to reject print jobs to the specified destinations. The -r option sets the reason for rejecting print jobs. If not specified the reason defaults to "Reason Unknown".
-E
Forces encryption when connecting to the server.
-U username
Sets the username that is sent when connecting to the server.
-h hostname[:port]
Chooses an alternate server.
-r "reason"
Sets the reason string that is shown for a printer that is
rejecting jobs.
The CUPS versions of accept and reject may ask the user for an access password depending on the printing system configuration. This differs from the System V versions which require the root user to execute these commands.