?zkan KIRIK:
> Hello,
>
> I'm trying to auth sasl using another smtp server's sasl auth.
>
> scenario is as shown below:
>
> [client] -> [postfix_as_email_gateway with auth plain] -> [another smtp
> server sasl auth plain enabled]
>
> postfix has no userdb & passdb. Is it possible that postfix connect to
> another smtp server and validate auth plain user credentials? Basically i
> want that postfix make auth against another server's smtp auth.
>
> What is the right way to do this configuration?
If it is not documented then it is not supported.
This requires new code, in the form of a Postfix XSASL_SERVER module
that 1) makes a TLS-encrypted SMTP connection to a remote SMTP
server, and 2) proxies the SASL protocol requests and responses
between the SMTP client and the remote SMTP server.
Problems: 1) the Postfix SMTP server must find out the remote SMTP
server's SASL authentication mechanisms before it can respond to
the SMTP client's EHLO command. 2) This is a very expensive
feature that cannot be exposed to the Internet.
Wietse
