Ing. Davy Leon:
> ok, thank a lot, it seems to solve my problem. Now how postmaster get 
> noticed about the fact one SASL authentication was rejected? If postmaster 
> doesn't get noticed and take an action, it will happen indefinitelly. How 
> postmaster get noticed?

I suggest that you exercise the Google system, and try queries of
the form:

    site:postfix.org postmaster bounce

This will lead you to quite rapidly to pages such as:

http://www.postfix.org/postconf.5.html#notify_classes

        Wietse

> Thanks
> 
> David
> 
> 
> ----- Original Message ----- 
> From: "Wietse Venema" <wie...@porcupine.org>
> To: "Postfix users" <postfix-users@postfix.org>
> Sent: Wednesday, August 26, 2009 10:43 AM
> Subject: Re: smarthost issue
> 
> 
> > Ing. Davy Leon:
> >> Hi all
> >>
> >> I have a postfix 2.3.3 running on Centos 5.3. Postfix delivers
> >> mail through an authenticated smarthost based on a per user
> >> authentication. Everything works fine until some smarthost's
> >> account get blocked for some brute force attack or something. The
> >> fact is that any mail from that user who's account is blocked at
> >> the smarthost can't be delivered and is bounced back to the user
> >> with some mail delivery error as soon as postfix try to deliver
> >> it once.
> >>
> >> My point is, how can I make this message that postfix couldn't
> >> deliver just stay around in queue for longer time and be retried
> >> everytime queue is processed, and postmaster be noticed about the
> >> problem to solve it wich is simple though the smarthost's web
> >> page. I want the end-user never gets aware of the problem.
> >
> > See: http://www.postfix.org/postconf.5.html#smtp_sasl_auth_soft_bounce
> >
> > Wietse
> >
> > smtp_sasl_auth_soft_bounce (default: yes)
> >       When  a remote SMTP server rejects a SASL authentication request 
> > with a
> >       535 reply code, defer mail delivery instead of returning mail as 
> > unde-
> >       liverable.  The latter behavior was hard-coded prior to Postfix 
> > version
> >       2.5.
> >
> >       Note: the setting "yes" overrides the global soft_bounce parameter, 
> > but
> >       the setting "no" does not.
> >
> >       Example:
> >
> >       # Default as of Postfix 2.5
> >       smtp_sasl_auth_soft_bounce = yes
> >       # The old hard-coded default
> >       smtp_sasl_auth_soft_bounce = no
> >
> >       This feature is available in Postfix 2.5 and later.
> > 
> 
> 
> 

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