> > Also, if the router rejected an email based on an RBL listing, the 
> > person sending the email would get the bounce (right freaking NOW!) 
> > and would know why. In the end, this will do more good than just 
> > sending spam to the bit bucket as it will put pressure on 
> ISPs to better regulate their users.
> 
> No, the person whose From: was forged in the spam will get the bounce.
> I'm pretty sure those stupid bounces make up about 10-15% of 
> the junk I get, and I can assure you that I'm not sending out 
> a bunch of spam.
> If you're using an ISP-based RBL, which would allow you to 
> reject messages before accepting them and partially avoided 
> the bounce problem (ro at least doesn't make it worse), then 
> you're blocking whole ISPs instead of spamming users.  It'd 
> be nice if ISPs cared, but a lot of them don't - and the 
> hapless victim users often don't know that they need to tell 
> their ISP about the mail blockage via RBL.
> Heck, half of the ISPs I've dealt with would say that's a 
> windows problem and that the user should "update their 
> antivirus" or reboot.
> :)
> 
> --Danny


I'm not totally sure, but if MY server tries to deliver an email to another
server and that server rejects it, my server will instantly generate a
bounce notice back to me showing that the email could not be delivered. This
is NOT going to the From address in my outgoing header. It is a result of
the failed connection directly from my server to the other.

This is the point of moving the RBL check to the front end of the mail
server. If I accept the email, THEN try to bounce it, I have only the From:
address to go by. If I bounce it when the other server is still "on the
line" talking to me, I /know/ the correct server got the message.

Or am I missing something?

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