Re: DMARC: perspectives from a listadmin of large open-source lists

[Dave Crocker <[e-mail]>]

On 4/14/2014 2:14 AM, John C Klensin wrote:
> There is a strong rule in RFC 5321 and its predecessor
> forbidding anything but the final delivery system from rewriting
> a local-part and it is there precisely because one doesn't know
> what sorts of conventions and indicates were begin used there.


Just to avoid possible confusion about the implications of the above:

      Mediators, like mailing lists, take final delivery and post a new 
message.  In formal terms, it's legitimate for them to create a 
different rfc5322.From field, including one that looks like some sort of 
'rewrite' of the one used by the original author.

d/

-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net