[Mailman-Developers] Google Summer of Code - Spam Defense

[Timo Wingender]

Jo Rhett schrieb:
> Timo Wingender wrote:
>> Discard messages from nonmembers is no option on most lists.
>
> AFAIK it is an option, but not the default and defaults are rarely 
> changed in my experience.
>
>> The first action is to integrate support for SpamAssassin in Mailman. 
>> Therefor I wrote a python class spamc which connects to spamd. This 
>> gives the possibility to scan all incoming Mail.
>
> Entirely my opinion, but I suspect that this will be harder to do and 
> less portable than having a mailman front-end that recognizes the 
> headers inserted by the major spam gateways.
>
> For example, the sites I am aware of run amavisd+SA in front of 
> mailman.  They aren't going to disable amavis to have mailman run SA 
> directly. Nor are sites with barrucudas likely to do so, etc etc.  My 
> opinion entirely, but I think it would be better to make mailman aware 
> of the headers inserted by these solutions.
Yes, most sites run an SA in front of mailman. But SA doesn't mark all 
spam. For me it finds over 90% but enough spam mails are not found. Most 
of the are simply to new. Scan them again later identifies them as spam.
Scanning incoming mail with SA is much easier then the interaction with 
SA in the later process. E.g. rescanning or train bayes filter.
>
> Again, just my opinion.
>