Mailserver, new users
I would like to setup a mail server on CentOS. I'm using postfix and dovecot. Is it possible to set it up so that you don't have to create new users? I don't want them in /home/ and I really wouldn't like them to ssh into the server. They just need to be able to send/receive mail (via squirrelmail as web-based client). How can I do this?
Thank you in advance!
There are a lot of ways to do what you want.
The simplest is to have dovecot use an alternate password file:
HowTo/SimpleVirtualInstall - Dovecot Wiki
Then you just have postfix authenticate with the dovecot SASL.
Postfix SASL Howto
You could also have postfix use users defined in LDAP or mysql - you can google for this.
You'll also need to configure Dovecot and Postfix to use virtual mailboxes. Google "Dovecot virtual mailbox" and "Postfix virtual mailbox" and you'll find walk-throughs.