Confusion about SPF
It seems that everybody are looking for one stop shopping for spam prevention. The truth is there’s no such thing, nothing will ever effectively stops 100% of spam, period. This is what happens with SPF. A good number of mail admins are reluctant to implement SPF on their servers because they found out it doesn’t stop much spam as they expected it before. Of course it won’t stop much spam for now. But if almost all domains on the Internet implement it, the spam problem becomes much more manageable. I think SPF is the next right step after we hunt down open relays since several years ago. We knew that closing open relays will not stop spam, but we did it anyway. Why don’t we do the same to SPF?