Re: qmail-ldap relaying to Exchange (yuck)

[Bruno Negrao]

You can direct all the exchange account to the same Maildir in the 
qmail-ldap machine, and then run on this maildir a software called 
"serialmail" that DJB did. Schedule it in your cron to run every N minutes. 
This way the messages just will be removed from the maildir if they were 
accepted or permanently refused by the exchange server.

bnegrao