>I have a subscriber who is getting errors on administrative Listserv >mail from SMTP on our IBM _and_ from LSMTP on our Alpha. The only >book I have here (1) with a definition of what's valid in a FQDN says >the underscore, as used below, is legal. I'm also not clear how it >got to Maelstrom from SMTP3 if the error is at our end. As much as I respect Marshall (I inherited his chair when I went to work at the Wollongong Group), if he says that underscores are legal in a host or domain name, I believe he's in error. Underscores have been widely _tolerated_, but they are not, to the best of my knowledge, legal. -- Lefty [gYon-Pa] <[log in to unmask]> C:.M:.C:., D:.O:.D:.