Controlling who uses TRANSMIT and RECEIVE

If you add TRANSMIT and RECEIVE to the table of authorized commands, by default, all TSO/E users can use them. You can use exits to:

Limit the use of TRANSMIT and RECEIVE to specific users. Use the TRANSMIT startup exit or the RECEIVE initialization exit.
Restrict the nodes to which a user can send transmitted data. Use the TRANSMIT startup exit, the RECEIVE data set pre-processing exit, or the RECEIVE post-prompt exit.
Suppress receipt of a data set. Use the RECEIVE data set pre- processing exit or the RECEIVE post-prompt exit.
Give users authority to receive data addressed to user IDs other than their own. Use the RECEIVE initialization exit.

The JES2 and JES3 exits (exit 13 and IATUX42, respectively) provide similar capability. Both can screen incoming files sent using the TRANSMIT command, and can delete them, reroute them, or allow them to be sent to the targeted user.