How do I add email sending capabilities?

[Gladfelder]

Some good and bad results. The following are the notes I made during the install process.

Code:

    ALL the following need to be sudo commands (sudo -i first)
    apt-get ran a cript as configuration pages appeared
    Selecting Satellite system as that seems most apropriate (sending but not receiving)
    DOMAIN - no idea1. Just in case, I created xbixn.<mydomain>.com and used that. I hope that is OK!
    SMTP relay host - left blank
    apt-get continued

    During the apt-get run I noted the following information;
        Postfix is now set up with a default configuration.  If you need to make changes, edit /etc/postfix/main.cf (and others) as needed.  To view Postfix configuration values, see postconf(1).
        After modifying main.cf, be sure to run '/etc/init.d/postfix reload'.

    From the instructions
        Check the log mail.log, mail.err, mail.info, mail.warn to see if postfix runs
        cat /var/log/mail.xxxx - nothing returned

    The next instructions related to domains which I believe were dealt with above so I skipped to testing
    Testing
        telnet localhost 25 in SSH terminal returned "-bash: telnet: command not found"
        telnet xbian 25 in cmd window (wWin7) returned "Connecting To xbian...Could not open connection to the host, on port 25: Connect
failed"
    Now what? apt-get install telnet
    telnet, use modified example in instructions to generate a test email.
    Checked logs as above - ALL blank? Expected .log to have something.
    Check gmail for message - nothing
    Wait for flexget cron job to run. Log shows nothing new so no emails to send

I am now unsure if the setup is correct or not. The lack of anything in mail.log does not look good.