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From: Edward avanti on 7 Aug 2010 01:33
On Fri, Aug 6, 2010 at 4:54 AM, Jeroen Geilman <jeroen(a)adaptr.nl> wrote:

> On 08/03/2010 02:05 AM, Edward avanti wrote:
>
> Halo Noel,
>
> On Tue, Aug 3, 2010 at 12:37 AM, Noel Jones <njones(a)megan.vbhcs.org>wrote:
>
>>
>>>
>>>
>>> It appear from more investigation this cause is SERVFAIL
>>> always send 4xx, can postifx override to 5xx with setting for
>>> SERVFAIL ?
>>>
>>
>> Why in the world would you want to 5xx reject on temporary errors?
>> Postfix would be insane to offer such an option. You will lose legit mail
>> anytime there is a DNS hiccup.
>>
>> Because in some case it is better to tell sender " there is problem"
> now, not them think mail delivered and 5 day later find out it not.
>
>
> Then set the delay_warning_time option to a suitable value.
>
> J.
>
>
Huh?
This setting will not affect anything on my end as I not sender with DNS
problem, the sender server need this setting, no setting on my end will
alter what they do.

Noel's suggestion on use access list to 54xx them work very good. Problem
now solved for us.
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