You'll be glad to know that I'm now rejecting at RCPT instead of blindly
forwarding to the exchange box! We don't have numerous updates in
active directory so for now I'm doing a manual export to the sendmail


-----Original Message-----
From: Daryl C. W. O'Shea [mailto:spamassassin@dostech.ca]=20
Sent: Thursday, 14 June 2007 11:53 AM
To: Anthony Kamau
Cc: SpamAssassin Mailing List
Subject: Re: Problems with Received: header checks and ALL_TRUSTED

In any case, spamming people with backscatter in the form of NDRs from=20
your system is completely unacceptable. You have at least three options

to prevent this; (i) configure out how to do LDAP queries from Sendmail=20
against your Exchange system to verify addresses, or (ii) use a milter=20
such as Anthony Howe's milter-ahead (which I believe he licenses for 90=20
Euros), or (iii) export all of your addresses to your Sendmail box.