Earl Hood <[EMAIL PROTECTED]> wrote: > On March 6, 2006 at 18:44, Bill Wohler wrote: > > > Earl Hood <[EMAIL PROTECTED]> writes: > > > > > I recommend "discard". Spammers are known to use originating addresses > > > of regular people, so you can potentially be the cause of receiving > > > more spam due to mis-directed bounces. > > > > Unfortunately, this is worse because legitimate posters don't get a > > notification that their message didn't get through. > > An unfortunate side-effect, but probably something we must live with. > Bounce noise can get bad and generate anger among those that receive > bounce messages that they never sent.
Bounce messages are treated like any other spam. I get lots every day but never see them. No anger. > I'm not sure how Mailman creates bounce messages, but bounces can > open a door for exploitation by spammers. Are you thinking they may take the bounce message, use Google to get a list of names on the mailing list, and then post using those names? Given how many spams I get to me on lists from people on the list, this is probably already happening. Hmmmm... You may have a point. But still, it's unlikely that anyone on this list is reading without a spam filter in place. So even if the list is exploited, our filters will discard the dreck anyway. Another thing to do, which I do on my lists, is to employ the filter before it gets to the list in the first place, which makes moderation once again possible. That way spammers get a nebulous "Permission denied" or nothing as you wish, and non-members get a useful bounce message. For example, I have the following alias: list: "|/usr/local/sbin/mailman-filter post list" The mailman-filter script is attached inline here. It uses bogofilter but could be adapted for any spam filter. The variables at the top need to be modified for your installation. I see I have to update MAILMAN for Mailman 2.1...
mailman-filter
Description: application/shellscript
-- Bill Wohler <[EMAIL PROTECTED]> http://www.newt.com/wohler/ GnuPG ID:610BD9AD Maintainer of comp.mail.mh FAQ and MH-E. Vote Libertarian! If you're passed on the right, you're in the wrong lane.
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