--On Monday, April 14, 2014 07:23 -0700 Dave Crocker
<dcrocker@xxxxxxxx> wrote:
> 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.
Yes.
john