How can I send an email from the command line?

Hi,

I' trying to cand execute a command in a shell-script to can send a email to
somewhere out of my LAN.
I 've seen another post about that but he want to do with evolution.
I don't have configured Evolution, could I do with other program? I've been
reeding that I could do with mutt. But I think that I need install MTA like
Sendmail. I 've installed sendmail but do I need configure?
What else I have to do it?

Any help?

Thanks a lot and sorry for my englsih
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