CAUCE (The Coalition Against Unsolicited Commercial Email)
CAUCE, The Coalition Against Unsolicited Commercial Email is an ad hoc, all volunteer organization, created by Netizens to advocate for a legislative solution to the problem of UCE (a/k/a "spam").
http://www.cauce.org/
"BounceStudio Enterprise met our very specific need to deal efficiently with the
bounced email messages produced by our newsletter campaign, while requiring
no alterations to our existing infrastructure."
