Test SASL authentication via telnet (or similar)

Hi,

I'm looking for a way to autenticate my email users via Dovecot SASL TCP connections from an external nodejs or python script.

Dovecot configuration is fine, if I set in postfix smtpd_sasl_path = inet:127.0.0.1:12345 works fine.

But if a try via "telnet 127.0.0.1 12345" to chat with SASL in dovecot log found:

dovecot: auth: Error: Authentication client not compatible with this server (mixed old and new binaries?)

What is the right way to chat with SASL via TCP port?

Thanks

-- Alessio Cecchi Postmaster @ http://www.qboxmail.it https://www.linkedin.com/in/alessice