[svlug] mandatory SPF?

[Nick Austin]

On Sat, Dec 09, 2006 at 07:42:53PM -0800, Rick Kwan wrote:
<..snip..>
> Does mandatory SPF authentication sound outlandish?
> Has anyone tried this?

It seems you would be setting yourself up for a potentially massive false
positive rate.

Before you decided to take this step, I would consider marking all the mail
with SPF pass or fail headers to get an idea of what you would be loosing.

A better approach might be using gray listing, along with RBLs and SPF.

The first step will give you some data to go on.

Thanks!
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