After compaining for so long about spam getting through via my @php.net mail address, the php.net mail admins have at least partially answered my prayers, this has started appearing in the headers.
X-Host-Fingerprint: 00.00.00.00 the.host.name Windows 2000 SP2+, XP SP1 (seldom 98 4.10.2222)
After a bit of investigation, it appears the very nice tool
p0f is being used transparently to recognize the sending machine type. I spent a bit of time here playing with this, although not perfect (it cant recognize hosts behind a NAT box), It's pretty darn good..
It does lead me onto the theory though
The real solution to spam is just to block all Windows boxes from public email servers....Seriously, I cant imagine anyone dumb enough to have a public facing Windows box, sending email. And what the hell, they should have to pay a relaying fee if they need messages delivered (if they are dumb enough to pay for windows, they are sure dumb enough to pay for a relaying service..)
This solution is alot simpler and more reliable than SPF.. hell, lets fire up an RFC, and get this standard layed down for good.. (oops I forgot to patent it..)
