> -----Original Message----- > From: Peter Matulis [mailto:[EMAIL PROTECTED] > Sent: Tuesday, December 07, 2004 6:55 PM > Subject: verifying DNSBLs > > And is there any difference in performance between > implementing them via SA or the MTA? Thank you.
As far as I know, most uses of DNSBLs at the MTA level are for rejecting message prior to taking any other action on them (i.e., accepting the message and then scanning with SA, etc.). So, if you use BLs at the MTA level, you're going to cut down on the number of messages accepted by the server for further action. If you implement via SA, you've already accepted the message for delivery and are just using the BL information to adjust message scoring. It's really a matter of taste, are you more willing to reject messages at the MTA layer (prior to accepting) knowing that there are bound to be FPs on the DNSBLs? Or, are you more willing to accept all messages and let the end user do what they wish with the messages? Hope this helps. -Joe K.
