LPRng-HOWTO: 15 Oct 2001 (For LPRng-3.7.9)
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# 6.5. Job Completion Notification Requested

Options used:

- `allow_user_logging` FLAG users can send status

- `lpr_bsd` FLAG lpr -m acts as legacy BSD flag

The `lpr -m mailaddr` option will put the specified mailaddr value into the control file. How this is processed is left to the particular server implementation. See the Abnormal Termination section for details.

LPRng extends the `lpr -m mailaddr` to allow mail addresses of the form `host[%port][/(TCP|UPD)]`, and when the job is being transferred or printed the lpd server to open a connection to the specified TCP/IP address and send job progress information. This is a security loophole and the `allow_user_logging` flag must be present to allow this operation.

The `lpr_bsd` will cause the `lpr -m` option not to take an argument, as in the BSD lpr, and will place the users name and host information in the control file as the destination for notification.

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