Raymond, It _should_ be fine to pop the HDD into another box and let it discover the new hardware, but never rely on it. Make a backup of "/etc" and "/var", and store them someplace safe. There may be other places that configuration info is stored, but that is at least a good start. Maybe store the output of "rpm -qa" in a safe place, along with any rpms/packages you downloaded separately from the original red hat distribution. That way, if the "hardware discovery" option goes bad, turn it into a fresh install and pull your backups/extras onto the new host and selectively replace the files you updated originally. Hopefully someone can give specific information on sendmail install files, but you should be able to get most of that info from the man pages, Email HOWTO, and from using "rpm" to query the sendmail package. Good luck, Troy >>> admin at support.lctn.k12.mn.us 07/17/02 09:59AM >>> Last week I had a mail server crash, so I set up a new Redhat 7.3 server for mail and web. I have manually added the users, and was pretty happy to resolve the problem. it now looks like the PC I used is unstable, so I have to move everything to another box. Can I just pop the HD into another box, and let it find new hardware? if not, I could use some info on what files to backup and restore to the new box, so I am able to preserve users, passwords, and mail. Thanks in advance -- Raymond Norton Little Crow Telemedia Network 320-234-0270