One final type of message indicates that all previous segments of a multi-segment were sent in error. If, after you have sent one or more segments of a multi-segment message, and realize that you need to discontinue the send request for any reason, you can do so by specifying SEGTYPE=ABORT on the next message segment sent with the IXZXIXSM macro. This segment also can be a null segment if you specify SEGTYPE=ABORT. The message, or null statement, is sent and timestamped, and the receiver returns an acknowledgement. However, it is likely that the receiver will immediately recognize this as "junk mail" and discard the message, although that is not necessary. The message must be received and acknowledged as the receiver processes any other message prior to being discarded. An aborted message is indicated by the ABORT_SEGMENT flag set on in the message envelope (mapped by IXZYIXEN) for both the first and last segments.