North American Network Operators Group

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Re: Time to check the rate limits on your mail servers

  • From: Todd Vierling
  • Date: Fri Feb 04 09:55:48 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 <[email protected]> <[email protected]>