SPF most certainly was not written by idiots, although MS's wacky SenderID carries the distinctive odor of cretinism. What you should perhaps understand is that SPF and DomainKeys/DKIM are complementary to each other, while SenderID bears all the hallmarks of yet another "just incompatible enough" Microsoft "extension" to SPF.

Hey, I'm an alpha lover myself.. I have a 666Mhz PC164 alpha.. running tru64 5.1 right now .. but i would love to find a copy of win2k beta 3 for alpha.. think you could point me in the right in the right direction...ive looked everywhere.. and microsoft denies it exists. if you can point me in the right direction, darkfires2000 at msn dot com id really appreciate it.. i love my alpha and breathing any new life into it is always welcome thanks