Time to check the rate limits on your mail servers

Fri Feb 4 14:53:07 UTC 2005

On Thu, 3 Feb 2005, Edward B. Dreger wrote:

> JJ> auth is sufficient to make email traceable to your own customers.
>
> End users also would appreciate the ability to _know_ a message is not
> forged.

The only way to be sure is via cryptographic signature.  Barring that level
of immediate traceability, SPF provides a very useful data point to that
end (as its *only* purpose is curbing forgery).

-- 
-- Todd Vierling <tv at duh.org> <tv at pobox.com>