On Sun, 2 Mar 2008, Дилян Палаузов wrote:
Does this mean, that a recipient cannot be rejected after RCPT TO: and 
before DATA: in a multi recipient message?
Yes, that's exactly what it means.
My apologies for my unclear statement.  The above was in relation to this 
text from the draft:
   Note that if a message is arriving over SMTP and has multiple
   recipients, some of whom have accepted the message, Section 2.1.2
   defines how to reject such a message.
In light of the quote, I interpreted the "after RCPT" in your question as 
meaning "after being accepted at RCPT time".  That is, I thought you were 
asking if it was possible to perform individual rejection of recipients 
that were accepted at RCPT time.
As for your actual question: IMO, the possibility of rejecting individual 
recipients by rejecting their RCPT commands is permitted by the draft.
Philip Guenther