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Postfix Archives: Re: 4xx vs 5xx for spam rejects

Re: 4xx vs 5xx for spam rejects

Subject: Re: 4xx vs 5xx for spam rejects
From: Jeff Johnson (jeffwebsitefactory.net)
Date: Mon Dec 20 1999 - 13:26:21 CST

On Mon, Dec 20, 1999 at 12:45:15PM -0600, Amos Gouaux wrote:
>[snip]
> Admins may alternatively set their systems up to tag messages
> delivered from open servers as "possibly spam", or just log the
> connections.
> While blocking mail using ORBS was a disaster for us, and we had to
> back out of it, I am intrigued by the comment above. Has anybody
> thought of a way to have Postfix tag such mail. I guess this falls
> into the same thing as adding headers, which Postfix doesn't
> currently do.

If you haven't seen this for Sendmail, I'd suggest that you check it out.
I'd love to add X-ORBS, X-DUL, etc. We had to back out of ORBS because
it caused WAY too much legit e-mail to be rejected. Right now we are
using a list of approx 3,500 blocked domains and e-mail addresses,
the shub-inter.net lists and the MAPS RBL list, and seem to be okay.

For an example of how ISP's are using this X-??? headers, see:

http://cgi.dearbirthmother.com/helpdesk/mailandnews/email_filtering/index.html

I guess they are using the Software available at
http://mjhb.mdr.ca.us/rblhack.html. Wietse, is there a way of doing
anything such as this? 

-- 
Jeffrey H. Johnson - jeffwebsitefactory.net - System Administration - TrN
Barnet Worldwide Enterprises - The Website Factory - www.websitefactory.net

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