[95821] in North American Network Operators' Group

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Re: Blocking mail from bad places

daemon@ATHENA.MIT.EDU (joej)
Wed Apr 4 18:24:29 2007

Date: Wed,  4 Apr 2007 18:14:45 -0400
From: "joej" <joej@rocknyou.com>
To: <nanog@nanog.org>
Reply-To: <joej@rocknyou.com>
In-Reply-To: <20070404194324.55768.qmail@simone.iecc.com>
Errors-To: owner-nanog@merit.edu


Yes, its an SMTP bounce, not a store, try to forward and return. 
I should have clarified.
 
> Right.  It also quite an effective way to be sure you never hear from
> non-technical users who don't understand your bounce message, 
>and from people like me who don't feel like jumping through your hoops,
> particularly in a case like this where we're responding to a question
> you asked.

Yes, unfortunately there are draw backs, I try to make the 550 bounce as
informative as possible, (url link yadayada) but.. With a maillist I see
the responses because I allow email from the network that serves the
maillist server, in this case NANOG (: So...

As needed I add IPs/Netblocks, but like I said very much over kill and
administratively burdening. But the upside is (I think maybe 1) spam email
in the last 3 months. I still get a count on the spam bounces, which have
decreased, month 1=1752 bounces, 2=1292, 3=899. Again not an answer, more
like a campaign..

Just my 2¢s on the whole thing.
Cheers,
-Joe Blanchard


On 3:43 pm 04/04/07 John Levine <johnl@iecc.com> wrote:
>
>
> >  1) You send bounces from spammers to innocent people, whose
> >  addresses have been forged.
>
> This is an SMTP reject, not a bounce.  It's a lethal variety of
> greylisting.
>
> This technique works great to keep spam out of your mailbox.
>
> > 3) You are dropping valid emails.
>
> Right.  It also quite an effective way to be sure you never hear from
> non-technical users who don't understand your bounce message, and from
> people like me who don't feel like jumping through your hoops,
> particularly in a case like this where we're responding to a question
> you asked.
>
> R's,
> John


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