Subject: RE: PRA and the dependancy on Resent-* headers.

From: "Harry Katz" <[email-masked]>
Date: Fri, 25 Jun 2004 11:46:14 -0700

On Friday, June 25, 2004 11:00 AM, Wayne wrote:

> Also note that the newest version of the Caller-ID PRA 
> algorithm depends on undocumented, non-standard and 
> depreciated headers, such as X-Envelope-To:.  Go figure.
 
The reason we added these headers into the PRA algorithm was to
recognize that there are some forwarding MTAs that already insert the
equivalent of a Resnt- header into the message and therefore they are
already compatible with the Sender ID proposal.

Wayne is correct that these are non-standard headers, but it seemed like
a relatively benign addition in order to enable forwarders that already
add those headers to be deemed compliant.