MY ISP does spam and virus filering for me then relays the email to my exchange 2003 server. This is working
great as it takes a load off my server.
They offer one more service. They can do a LDAP quarry to my network for valid emails
and if it is a valid user then the mail would be fowarded to me, otherwise would be dropped
at thier server. This sounds great but how do I make it work. Exchange itself do not answer
LDAP quarries and I dont want to put a DC in the DMZ.
So can I setup a LDAP server service on a box that is visable to them and then use the firewall
so only they can quarry it?
Is this worth spending more time on trying to resolve?
The ISP feels that it very worth while and can prevent DOS attacks.