As there is no longer a vendor supporting the former MultiNet MM user agent, Process Software can no longer continue to support the MultiNet MM interface in PMDF. The actual code in PMDF for supporting MultiNet MM has not yet been removed from PMDF and it should continue to work as well as it ever did; but problems discovered in it cannot be resolved. New sites should not use this and old sites using MultiNet MM should plan on migrating.
MultiNet MM supports PMDF as one of several possible message transfer agents. The MM user should not be aware of any difference between PMDF and any other transfer agent.