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.
