Gordon Messmer writes: 

> On Thu, 13 Dec 2001, Sam Varshavchik wrote: 
> 
>> Gordon Messmer writes:  
>> 
>> > It seems that the simplest way to cancel a message that hasn't been 
>> > delivered is to return an SMTP style error code, as the documentation 
>> > suggests.  Do you disagree? 
>> 
>> By the time the message is queued up, there's nobody around any more to 
>> receive the smtp style error code. 
> 
> Durning my tests, the filters are run during the SMTP conversation, and
> work fine, which is to say that messages get rejected, when I return error
> codes.  When is this not the case?

Take dupfilter, for example.  When it picks up a dupe, it'll reject it, and  
try to cancel any dupes that were previously accepted into the mail queue, 
and remain undeliverable. 


-- 
Sam 


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