How to use SMTP to send mail to some host?

I'm trying to use SMTP to send mail to my account on some server (say, on Gmail).

So far I've tried:

220 mx.google.com ESMTP y14sm3079810ibf.45HELO250 mx.google.com at your serviceSTARTTLS220 2.0.0 Ready to start TLSAUTH LOGINConnection closed by foreign host.

What am I doing wrong, and how can I fix it so I send an email as though I were my own server?

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