We are implementing an SMTP tarpit spam system in front of Zimbra in order to lower spam rate with postfix.
For our system, we query zimbra via LDAP in order to detect it an email is or not valid, enabling postfix tarpit if the error number in reception emails is high. So, our architecture is postfix -------> zimbra (postfix also)
The system is working without problem, and front postfix queries zimbra LDAP without problem. Our base query es "mail=%s"
However, if an email address is marked as hidden in Zimbra GAL, we cannot query it via LDAP althought address is in fact there and it is valid, so our postfix should forward email to zimbra but it doesn't due to does not appear in LDAP query.
So the question is, how can we query a valid email address vía LDAP if this is marked as hidden in GAL from Zimbra.
Thanks in advance.