Stuart Henderson wrote:

quoted text
> On 2007/05/22 17:12, Renaud Allard wrote:

>> I have only seen this when the 4xx error is sent at DATA time, not when

>> sent at RCPT TO.

>>

>>> How about: --i-dont-want-to-receive-mail-from-people-using-exchange-2003

>>> and --i-dont-want-to-receive-mail-from-people-using-callout-verification

>> Those are the default flags indeed.

>

> they're mutually exclusive:

>

> 4xx at RCPT, break callout verification.

> 4xx at DATA, break msexchange 2003 direct-to-mx delivery.

> 

Well, 4xx at RCPT doesn't really break callout, it just delays the mail

a little bit further. Unless the callout is broken and answers the

sending server with a 5xx when it receives a 4xx as response from the

callout. But to be sure not to delay or break callouts, MAIL FROM:<>

should be redirected to the real server directly. However, this is quite

tricky to do as the communication with spamd has already started and you

could not just pipe the input to the real server.
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