A system and method for messaging subscription management by subscribing a
subscriber to a publisher, providing a broker brokering message flow
between the publisher and the subscriber whereby the publisher publishes
information to the broker which then forwards the information to the
subscriber, and filtering messages whereby any messages not originating
from the publisher are filtered out. The filtering may comprise modifying
at the publisher a filter supplied by the subscriber and sending the
modified filter to the broker, or may comprise modifying at the
subscriber a filter and sending the modified filter to the broker.