Hi there!
1. I would like to setup a medium ISP mail server (about 200 users, 2000 messages/hour, upto 500.000/hour in case of serious spam) and I am still not quite sure: qmail or xmailserver? It has to be a webmail-capable server, too...
2. Do you have rpm's for any one of the above servers? For SuSE 8.2, if possible, of course ;)
I use qmail on 8.2 without a problem. You requirements as list above will easily be handled on a 486 machine with stock qmail. On a 486 machine, you could pump through over 1 million emails a day. If you want a web interface, obviously you will need something a little more powerful <g> qmail has *never* had a security breech, and there are several web interfaces to use if you wish, having not only mail, but calendar capabilities... answers to all your questions are at www.qmail.org I have used, over the years, Sendmail, Postfix, and now qmail, and I just prefer qmail. There are rpms at the qmail.org site, but it is preferable to install them the first time via tarball, so you get a good working understanding of how qmail works. Actual step-by-step instructions for everything of the install is at www.lifewithqmail.org -- Gary