h a l f b a k e r y
non-lame halfbakery tagline
add, search, annotate, link, view, overview, recent, by name, random
news, help, about, links, report a problem
or get an account
An e-mail program parameter on the receiver's end that removes the gratuitous spam people, freemail providers and companies put on the end of the message
and, of course, disinclude it in any reply function text.
(which means there needs to be a way of distinguishing between text and sig, preferably without involving the user, but that's for another day)