[Mimedefang] OT: Validing email address in Exchange

[Ray Parish]

Sorry for the OT:
Figured some of you all are using mimedefang in front of your Exchange enviroment and perhaps have the same issue.

I would like to configure sendmail using LDAP to check the validity of an email before accepting the message.
I know sendmail can make the LDAP calls, just a little stumped at the ldap search query that needs to be preformed.

Thanks