The PMDF Application Program Interface (API) is composed of the
routines described in this chapter. The API can be used to submit to or
remove messages from PMDF's message queues. The act of submitting a
message to a message queue is called enqueuing while removing
a message from a queue is called dequeuing. User
interfaces1 enqueue messages in order to send mail; while
programs that interface with other networks and mail systems dequeue
messages to remove them from the queues. Some intermediate processing
programs, such as document converters, can both dequeue and enqueue
messages.
Note
The callable SEND interface can be used simultaneously with the PMDF
API routines.
Note
1 User interfaces that send mail are
generally referred to as User Agents (UAs).