Re: What to do with backscatter?

Arthur Dent wrote:
> One thing that does plague me however is a periodic rash of Non
> Delivery Receipt messages (I've just had one now - about 10-15 or
> so). These score anywhere between 1.2 and 11.1 but mainly around the
> 3.7 mark (below my spam threshold of 5.0). They all hit the
> ANY_BOUNCE_MESSAGE rule.

I think the best thing to do is to reject as many of those messages as you can at SMTP time. I am using Postfix with good result incorporating the ideas from this reference.

  http://www.postfix.org/BACKSCATTER_README.html

Other MTA's will use similar methods.

Bob