On 23/01/2010 20:25, Martin Gregorie wrote:

>> The only thing I can picture, technically, is a kind of auto-whitelist, or 
>> a user-specified whitelist.
>>
>> The former is subject to various pitfalls, as I've already experienced on 
>> my system, and the latter, even though available to the user as a post-SA 
>> filtering option, tends to get ignored by 95% of users. So the extra 
>> effort to inject a per-user whitelist mechanism into the MTA would seem to 
>> be a waste of time.
>>
>> I'm all for 'reasonable' suggestions, but they really do need to be 
>> 'reasonable' in the context of the user base. :)
>>
> Store user linked whitelist URLs in a relational database. Use an SA
> plugin to apply them. Provide a GUI tool with a really simple interface
> to allow users to maintain their own whitelist and blacklist entries.
> Using a relational database to store the lists makes it simple to
> distribute a GUI tool that's capable of being run remotely on user's
> desktops and should give good comparison performance.
> 
> Would something along those lines meet your user-friendliness criteria?

If your mail server has address book functionality, then you can use
that as a whitelist. I wrote an application for doing it with
CommuniGate Pro:

https://secure.grepular.com/CommuniGate_Pro_Contact_Folders_as_a_Whitelist_Source_for_Exim

I also add recipient addresses to a MySQL based whitelist on my MSA
(Exim): https://secure.grepular.com/Whitelist_Recipients_in_Exim

-- 
Mike Cardwell    : UK based IT Consultant, Perl developer, Linux admin
Cardwell IT Ltd. : UK Company - http://cardwellit.com/       #06920226
Technical Blog   : Tech Blog  - https://secure.grepular.com/
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