04/12/2008
New in SpamSentinel Version 7.5
SpamSentinel version 7.5 now contains a feature that enables you to block almost 90% of your spam email before it reaches your systems. This reduces bandwidth usage and also saves CPU processing time and disk space. There are two options that you can use:
SMTP Silent Delete (Recommended)
This method will read just enough of the message into memory to make an accurate judgement on whether it is confirmed spam, this happens when both of our spam checking engines agree 100%. The message is then deleted from memory and the SMTP connection is dropped. The beauty of this is that the spammer gets no notification of why the message did not go through and will probably give up trying at that point.
SMTP Reject Notification
This is the same principal as above but rather than drop the connection we send a 'Permanent Failure' message back to the sending server. It is then up to the sending server to generate a delivery failure message to the spam sender. In most cases this will not happen as the 'bots' that send spam will just ignore the failure and move on.
To enable this new feature, open the SpamSentinel Server configuration in the SpamSentinel Admin database and switch to the 'Advanced - Notes/Domino' tab. See the screen shot below for an example:
