I have just set up a a production server with Qmail, trying to mirror a development server. The production server is a much faster machine, but sends mail slowly, and the header includes this: Received: from unknown .......................... The development machine has information about itself, in place of "unknown". And sends mail much faster. This is a header from a mail I sent to myself from the server running Qmail. I think I need to tell my development server it's name. :) Any ideas? Thanks, Peter Janett