On Mon, Sep 08, 2014 at 10:47:02PM +0200, giacomo wrote:

> I send you the configuration of Postfix.

Change the password for this account:

    Username: d.lis...@gruppoisil.com
    Compromised Password: lisaia

> smtpd_sasl_auth_enable = yes
> smtpd_sasl_local_domain = $mydomain
> smtpd_sasl_security_options =

So you're using Cyrus SASL, but not showing any details of the SASL
configuration, available plugins, ...

> > 220 mail2.domain.com ESMTP Postfix
> > ehlo tin.it
> > 250-mail2.domain.com
> > 250-PIPELINING
> > 250-SIZE 10240000
> > 250-VRFY
> > 250-ETRN
> > 250-STARTTLS
> > 250-AUTH PLAIN LOGIN
> > 250-AUTH=PLAIN LOGIN
> > 250-ENHANCEDSTATUSCODES
> > 250-8BITMIME
> > 250 DSN
> > AUTH PLAIN AGQubGlzYWlhQGdydXBwb2lzaWwuY29tAGxpc2FpYQ==
> > 535 5.7.8 Error: authentication failed: generic failure

Avoid posting "AUTH PLAIN" and "AUTH LOGIN" command arguments, they
contain reversibly (base64) encoded passwords.

> > Jul  5 23:11:19 mail2 postfix/smtpd[3717]:
> > warning: SASL authentication failure: could not verify password
> > Jul  5 23:11:19 mail2 postfix/smtpd[3717]:
> > warning: SASL authentication failure: Password verification failed
> > Jul  5 23:11:19 mail2 postfix/smtpd[3717]:
> > warning: unknown[192.168.1.248]:
> > SASL PLAIN authentication failed: generic failure

Cyrus SASL was not happy.

-- 
        Viktor.

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