On Thu, Jan 27, 2011 at 04:08:20PM -0500, Leonel Florin Selles wrote:
> ... if I use a mail client without any
> authentication mechanisms to send mails the server sends the mails, and I
> need that the only way to send mails be the SMTP auth.
To enable SASL:
http://www.postfix.org/SASL_README.html#server_sasl
To enforce SASL
http://www.postfix.org/SMTPD_ACCESS_README.html
For a pure MSA (authenticated clients only) the Postfix master.cf
file contains a commented-out submission service with essentially
all the settings you need.
--
Viktor.
