Re: RFC on concept: mailinglist_reject_nonsubbed

Hi Robin,

please have a look at our db/suite, especially the module db/user
http://dienstleistung-kultur.de/qpsmtpd/db_user.shtml

A description of our mail system and statistics you'll find on
http://dienstleistung-kultur.de/spamstat.shtml

Maybe you get some inspiration from our solution.

Sincerely,

Ernesto



Am 29.06.2010 04:13 schrieb Robin H. Johnson:
> I'm mucking with an idea, and hoping the denizens here might have some
> input, esp. about potential breakage introduced.
> 
> Summary:
> For any given valid recipient, compare the sender whitelist of exact
> matches and regexes.  If the sender is NOT present, issue a permanant
> deny (5xx).
> 
> Details:
> For the Gentoo mailing lists, we're seeing a lot non-subscriber traffic
> that just presently gets dumped to /dev/null (no list bounce saying
> you're not subscribed), and I would like to outright prevent that
> traffic. At the same time, this would enable legitimate users that just
> didn't have their subscription correct to get an error message (from
> their outbound mailserver).
> 
> I'm wondering what breakage this idea is going to cause, esp. if there
> are some mailservers out there that might cache failures.
> 


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