On Tue, Oct 07, 2008 at 11:54:59AM -0400, Darek M. wrote:
> >This is a transient failure. What are your unknown_mumble_reject_codes
> >set to? After tuning and testing your rules, you should have:
> >
> > unknown_address_reject_code = 550
> > unknown_client_reject_code = 550
> > unknown_hostname_reject_code = 550
> > unknown_local_recipient_reject_code = 550
> > unknown_relay_recipient_reject_code = 550
> > unknown_virtual_alias_reject_code = 550
> > unknown_virtual_mailbox_reject_code = 550
> >
>
> I didn't change any reject codes from the stock install, and I'm fine
> with a temporary reject for DNS errors. The issue is Postfix not seeing
> the reverse entry.
>
> unknown_client_reject_code = 450
> unknown_hostname_reject_code = 450
With these, we can't distinguish transient DNS lookup problems from
other errors, and blocked legitimate senders don't learn that they
have failed to send until days later. I would suggest you switch to 5XX
codes.
--
Viktor.
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