smtp - getting "530 5.7.0 Must issue a STARTTLS command first." error when sending mail via netcat -


i'm trying send email netcat, get:

****-macbook-pro:~ ***$ nc smtp.gmail.com 25 220 mx.google.com esmtp h8sm66301168eew.16 - gsmtp helo gmail.com 250 mx.google.com @ service mail from: <******@gmail.com> 530 5.7.0 must issue starttls command first. h8sm66301168eew.16 - gsmtp

what starttls command , need it?

starttls extension plain text communication protocols, offers way upgrade plain text connection encrypted (tls or ssl) connection instead of using separate port encrypted communication.

http://en.wikipedia.org/wiki/starttls

the smtp server saying won't accept plain text connections.


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