RE: PRA Patent: License for Display in MUAs?

["william(at)elan.net" <william@xxxxxxxx>]

On Fri, 3 Sep 2004, Jim Lyon wrote:

> On Friday, September 03, 2004 at 9:46 AM, Arnt Gulbrandsen wrote:
> > What happens if a message is sent on Saturday, the sender publishes a 
> > new policy on Sunday, and the recipient's MUA attempts to verify the 
> > message on Monday?
> 
> If I recall correctly, in the original CallerID spec:
> 
> 1. If you're retiring use of an MTA, your record should continue
>    to reference it for at least 28 days after it last sent outgoing
>    mail.  and
> 
> 2. An MUA must not attempt to validate messages received by their
>    org more than 28 days ago. 

That is a bad idea. First of all trying to track email and do the changes 
some time after is not an easy thing, some ISPs may not be able to accomodate.
Second there are number of references as part of SPF records to other dns
records, such as to "A" record of hosts, to MX records, to PTR, etc. All 
these may have to change lot faster and not be possible to wait 28 days.

Speaking as an ISP operator, I'm opposed to any language in the text that 
will specify time in which we have to change dns records when ips have 
already been changed or any constraints on provisioning and renunbering.

-- 
William Leibzon
Elan Networks
william@xxxxxxxx