I am getting ready to go to either a Barracuda or IronPort solution that uses LDAP.
It's much easier, and vastly cheaper, to export your recipients to a non-$$$subscription solution like IMGate. Why unnecessarily pass 1000s or 100s of 1000s of LDAP or SMTP queries for non-existent recipients DoS your mailbox server? That's imply bad system design.
Len
