> Also noticed that I got several ok'ed messages from the server with the > following errors: > > An error occurred while processing file 97353 from > [log in to unmask]: > "Mail message sent to the LISTSERV address contains invalid RFC822 fields > and > could not be parsed successfully". > > RFC822 parser messages follow: > > <W> MESSAGE-ID field duplicated. Last occurrence was retained. > > I have seen this error before, and have not been able to determine what is > causing it? It means that there are two Message-ID headers in the message. Message-ID is used to provide a unique identification code for a message, so that it can be referenced by other messages. LISTSERV complains even when the two message-ids are identical (as usually seems to be the case when I see it).