It sounds like it could indeed be DMTVMH (certainly not LISTSERV anyway), but I have no idea what could be causing the problem. It's been a long time since I wrote this, and I think the place where the encoding takes place ensures that resending the buffer after a line error does not corrupt the tables, but then I could be wrong (or it might get garbled after a timeout or there might be interaction with other local mods or it might be an act of the Divine powers or anything). Eric