The TMPMBX privilege lets the user's process create a temporarymailbox by executing the Create Mailbox and Assign Channel ($CREMBX)system service.
Mailboxes are buffers in virtual memory that are treated asif they were record-oriented I/O devices. A mailbox is used forgeneral interprocess communication. Unlike a permanent mailbox,which must be explicitly deleted, a temporary mailbox is deletedautomatically when it is no longer referenced by any process.
Grant this privilege to all users of the system to facilitateinterprocess communication. System performance is not likely tobe degraded by permitting the creation of temporary mailboxes, becausetheir number is controlled by limits on the use of system dynamicmemory (BYTLM quota).
HP OpenVMS Guide to System Security
Security for the System Administrator
