KD>     I have written an external test that at the domain level allows
KD>     the administrator decide whether the "domain" or "user" level 
KD>     has priority when whitelisting or blacklisting.

What's your logic in that?

The idea is the following:

A specific company has certain organization that it deals with on a 
daily basis and therefore at the company (Domain) level there are 
certain defaults that should take place.   Some of the companies we
work with take the position that this is the way it is and allows no
deviations.  Other companies look at these lists a general guideline
and as such individual (or groups of) users should be allowed to 
override these defaults.  An example would be an architectural firm 
and information from the American Institute of Architects should be 
allowed in for all users (Whitelisted), but an engineering group 
within the firm may not want the same email and therefore the same
list may be blacklisted. 

The approach we took we the C++ routine was written was to add an 
option "COMPANY" that when enabled does not allow a user (or group)
setting to override the company settings.  And when the same option
is disabled, the preference goes to the user (or group).

...

We wrote C++ that parses every message from /spam and moves it to a use specific
folder, then give users access to folder through web GUI and
auto-delete after 10 days old.

BEWARE...NTFS doesn't like lots of
nodes in one root.  Right now we have about 3 million files and have
broken them down by drive:/Spam/<A-Z>/Domain.ext/<A-Z>/username/Q and
D files.  Sure there are better ways, but breaking down by A-Z was
easiest.  Holding spam with a file structure spam/domain/user took WAY
too long on disk access.  Also, you should format your drive with a
smaller cluster size than DEFAULT.  Remember 1/2 of all your files on
that drive will be less than 1k.  And...if you're using RAID
controller, disable Read-Ahead caching.

....

We've already run into this issue and are in the process of writing
a similar routine.  Our goal is to allow at the company level to
specify the number of days and if they want to hold more than the 
default number of days we are going to charge them additional fee.
The same idea applies to store and forward messages.


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