Hi list!

This is mostly a Postfix problem, but perhaps some one on the list has a ready answer.

Versions:

openldap2.3-2.3.24-1rhel.4es maildrop-2.0.2-1.4AS postfix-2.3.20060611-4.rhel4, RHAS4u3

For mail from the Internet Postfix runs 2 proxy content filters that both hand messages back to Postfix.

Finally Postfix hands to maildrop via a transport:

master.cf:

maildrop unix - n n - - pipe flags=DRhu user=vmail argv=/usr/bin/maildrop -w 80 -d ${user} ${sender} ${recipient} ${extension} ${user}

maildrop uses LDAP for user authentication and quota maintenance. If a user's mailbox is over quota, it neatly notifies Postfix. Problem: the sender never gets notified that the recipient is over quota, only postmaster (in our case). Even with Postfix 2.3 there doesn't seem to be a way of setting error_notice_recipient to the sender, rather than a system user, e.g. postmaster.

Or is there?

Grateful for all pointers,

--Tonni