Hello,
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.
In the discussion I have not seen why this shall not be possible.
Because doing so in SMTP is impossible without unstandardized
extensions. (How is the server supposed to indicate that a message is
being rejected for rcpt A but not rcpt B?)
MAIL FROM: <me(_at_)example(_dot_)org>
250 OK
RCPT TO: <you(_at_)example(_dot_)com>
250 OK
RCPT TO: <mailing-list(_at_)example(_dot_)com>
550-You are not permitted to post to mailing-list(_at_)example(_dot_)com from
550 your me(_at_)example(_dot_)org address.
RCPT TO: <boss(_at_)example(_dot_)info>
250 OK
DATA ...
Why shouldn't be a sieve script allowed to set the 550-response here?
Със здраве,
Дилян