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".

But then AOL is AOL.  Do we really expect them to abide by RFCs?

-- 
Lindsay Haisley       | "Fighting against human |     PGP public key
FMP Computer Services |    creativity is like   |      available at
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                      |      (Pamela Jones)     |


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