stefan novak: > Is there a way to tell postfix to accept the E-Mail only when the > exchange Server also wants to deliver it.
Postfix uses the RCPT TO command to find out if a server is willing
to accept the message.
In the case of Dovecot, there is a way to find out if a user is
over quota (talk to the quota service).
Unless there is a way to ask the Exchange server about quota status,
Postfix cannot find out whether a user isoverr their mail quota.
Wietse
