Huh, just found Noel's excellent response in my gmail Spam folder. Sorry for the duplicate response.
On Mon, Feb 22, 2010 at 6:21 PM, David DeFranco <david.defra...@gmail.com> wrote: > It's called Backscatter, and yes, it's a pain. > > Try this: http://www.postfix.org/BACKSCATTER_README.html > > > > On Mon, Feb 22, 2010 at 11:59 AM, Cameron Camp > <came...@logicalwebhost.com> wrote: >> Forgive me if this has been asked (or point me thusly): >> >> My postfix box is getting e-mails where dirtbagspam...@whatever.com >> sends to someothercrapaddr...@whereverelse.com and uses a valid e-mail >> address on my server for the return, so I get a non-delivery e-mail from >> the someothercrapaddr...@whateverelse.com mail server to the client >> (virtual hosted) on my server. How can I block clients on my box from >> getting these e-mails or discard these automatically, will postfix do >> this? Apparently the spammers just got a valid e-mail my client had >> somewhere like on a website and just used it as a return address for the >> spam operation, or are there other scenarios that would likely cause >> this? My box isn't blacklisted, has the right RDNS, and isn't >> open-relaying. >> >> Best, >> Cameron >> >> >
