> -----Original Message-----
> From: John Palmer [mailto:nanog@adns.net]
> There is no "collateral spam" in most cases since the e-mail addresses
> on the original spam are bogus and never make it out of our system.
> Either bogus domains in which MX records dont exist or bogus usernames
> that the MTA for the domain in question rejects.
That hasn't really been my experience. My domain gets a lot of collateral
spam every time a new email virus appears on the scene.