It is useful to provide a mechanism to allow, at least temporarily,
communications to occur without blocking between a first entity and a
second entity with whom communications with the first entity are
likely/anticipated and desirable, generally through use of a white-list
having transactional entries. For example, to allow communications
between a communications user and an intended recipient, the user may be
added to global and/or personal white-lists for or until a specified
transaction or duration. Thereafter, the user may be removed from the
white-lists upon occurrence of an end trigger, which may include an event
or expiration of a specified time. The disclosed systems and methods thus
permit the transactional white-listing of users for a limited time
necessary to ensure the intended recipient receives the anticipated
communications. Thereby, the systems and methods guard against the
anticipated communications being accidentally blocked as spam by other
communications filters.