On Wed, Jan 26, 2005 at 07:07:37PM -0500, Stuart D. Gathman wrote:
We need to work on the public perception of SPF being unreliable or
error-prone.
I've seen two things referenced wrt SPF being "unreliable":
1) mistakes by SPF publisher, buggy SPF client software, and/or
incorrect receiver forwarding configuration causes
incorrect results.
2) publisher can specify results of NEUTRAL or SOFTFAIL.
I forgot:
3) User expected SPF-classic to verify 2822 From, but it doesn't. We
can blame senderID for that misconception.
Apart from these, perhaps some of the perception comes from the fact that
they've been "sold" on SPF as an anti-spam system. But I expect most of
it comes from the forwarding problem (i.e. that too many forwarders slag
off SPF).
Cheers,
Nick