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List:       postfix-users
Subject:    Re: "max_use=1" does not work at a situation
From:       Wietse Venema <wietse () porcupine ! org>
Date:       2020-08-31 14:27:36
Message-ID: 4BgCGJ33SSzJrP1 () spike ! porcupine ! org
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Wietse Venema:
> Wietse Venema:
> > kawakami:
> > > And this problem occurs NOT always, only in following situatision,
> > > 
> > > > 2, A message was sent on IPv4, but resuted 451 error.
> > > > 3, A message was sent on IPv6, but resuted 451 error. 
> > 
> > After a 4xx error, the SAME  Postfix SMTP client process may
> > IMMEDIATELY try to make the SAME delivery to a different MX host.
> > If this is new, please read the SMTP protocol spec, RFC 5321.
> 
> And as always, DO SHOW LOGS.

And configuration, as requested in
http://www.postfix.org/DEBUG_README.html#mail

	Wietse
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