Are the people in question set to MIME and DIGEST? Try setting them to NOMIME if so. (MIME is the default for all new subscribers in 1.8c.) The problem with MIME digests is that not all mail clients are capable of dealing with them. Normally if the user turns MIME off, the problem is alleviated. If the users in question aren't set to MIME and DIGEST, you may have to look a little closer at how the remote system is handling the incoming mail. Is there a per-message size limit or something like that? It is highly doubtful that LISTSERV is sending empty-bodied messages. Nathan