Folks, I'm running a RHEL 4.2 server w/sendmail (8.13) as a mail gateway. I currently use a mailertable entry to forward email to an exchange server after some basic spam, av, and rbl filters. The problem I'm facing is all the spam that gets by it which is destined for ficticious users gets bounced back to the gateway server. (I'm not rejecting or discarding spam, just marking it.) I'm getting 350 +/- NDA bounces a day! I believe I can use Sendmail's built-in ability to perform LDAP queries for valid users (a.k.a. smtp addresses) in the active directory / exchange environment. If I understand it correctly, this query takes place during the smtp layer and will bounce the email for unknown users immediately (from the gateway/linux server, rather than the current situation which lets the email into the exchange store and attempt to send a NDA to the sender, which is now my mail gateway.
I've been looking around for a HOWTO, but can't seem to find one. Does anyone have any suggestions on where I might find a simple HOWTO? I dread the thought of having to dig into the bowels of ldap to figure it if someone's already documented it. ;( Thanks in advance! -- Paul @ Thy Service -- TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug TriLUG Organizational FAQ : http://trilug.org/faq/ TriLUG Member Services FAQ : http://members.trilug.org/services_faq/
