RedHat 7.2 and sendmail
 

Hello,
I have RedHat 7.2, sendmail as mail server and firewall with iptables. I'm newbie in Linux and will become the new system administrator. I need to learn quickly Linux configuration, but most of all, how to administrate the sendmail (how to create new mail accounts, passwords, users rights, etc). Could somebody recommend me a good on-line manual about:

- Linux RedHat 7.2 configuration
- Sendmail (how to create new mail accounts, passwords, users rights, etc)
- configuring Firewalls with iptables

Thank you very much!

Try this
1) http://www.redhat.com
2) I give you an advice, ditch sendmail and get postfix and try this web http://www.postfix.org
3) http://www.iptables.org