To send an e-mail to a mail-server use the following commands:
Telnet <hostname_of_mailserver> 25
MAIL FROM: <yourname>@domainname.tld
RCPT TO: <firstname.lastname@example.org>
<enter your message>
The e-mail server should send the message out. Normally (to block relaying) the server will only send e-mails from your own domain!
root@server: telnet 192.168.1.1
Connected to 192.168.1.1.
Escape character is ‘^]’.
[root @ home]$ dhcpserver
[root @ dhcpserver]$ stop
DHCP Server stopped !!!
[root @ dhcpserver]$ ..
[root @ home]$ dhcp stop mer0
DHCP Client Stopped Interface = mer0
[root @ home]$ bridge
[root @ bridge]$ bridge delete
[root @ bridge]$ group eth0 mer0 -o eth0
[root @ bridge]$ bridge enable
[root @ bridge]$ cd ..
[root @ home]$ save
Configuration saved successfully
[root @ home]$ exit
http://packetlife.net/ Nice website with a lot of Network and Cisco information (recommend a look at their cheat sheets)