The ISP that I work for wants to setup a new mail "system" to process outgoing and incoming emails. The reason is because right now we have ONE single machine running BSDI with Sendmail and QPopper and the load is just too much for thousands of clients.
The Sysadmin's latest idea is to separate the Sendmail/Qpopper processes into 2 different computers dedicated to each task. Problem is he also wants to centralize our Userbase and _separate_ it from the regular /etc/passwd file, such that our ISP clients are in a user database COMPLETELY independent of the local password files. Is this possible? We will be using Sendmail with Procmail to process delivery and Qpopper to process POP3 requests. Can these programs be configured to use another password file than /etc/passwd? The end being separating our local users (sysadmins only) from our isp email users (plain mortals :)
One more thing... even if all this were possible, is it a good idea? is there any alternative better than this? Any help on the subject will be VERY much appreciated. I have recently been "promoted" from software design to NOC and have been bestowed with incredible tasks that I don't even know much about. I learn fast but I don't know where to look for information...