On Fri, February 3, 2006 2:11 pm, Lindsay Haisley wrote:
> Thus spake Jay Lee on Fri, Feb 03, 2006 at 01:01:46PM CST
>
>> On Fri, February 3, 2006 1:49 pm, Dave Platt wrote:
>>
>>> That trick doesn't seem to work for an smtpfilter, however.  If one
>>> tries to echo a 4xx temporary-failure code in an smtpfilter, Courier
>>> prefaces the whole string (including the 4xx) with a 558 code, making
>>> the error permanent rather than temporary.
>>>
>>> I'm not sure why this distinction exists in the code.  It'd be nice
>>> to allow an smtpfilter to return a temporary error, too.
>>
>> I believe it's because that's what the SMTP RFCs require.  Once the
>> receiving server sends the OK send data acknowledgement it can't return
>> a 4xx temp error.  It must either reject the message or accept it for
>> delivery.  Yeah, it sucks but that's the way it is...
>
> AOL does it!  If your IP happens to be on one of their blacklists and you
>  try to email an AOL subscriber, you don't get an error until you've
> completed the data section of your email and then the AOL mail server
> says "421 SERVICE NOT AVAILABLE".

I'm sorry...  Did you really start an argument with the words "AOL does
it!"!?  Yes, I have reached the end of the internet...  :-)  Honestly, I
don't know and I don't have time to dig through the RFCs right now (nor do
I desire the headache I get when read RFCs...)  Sam could say better why
4xx errors aren't possible with .smtpfilter.

Jay
-- 
Jay Lee
Network / Systems Administrator
Information Technology Dept.
Philadelphia Biblical University
--


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