Re: Update to RFC 5322 to allow "group" syntax in the "from" header

I should also add that I believe this change addresses the remaining issue.

				Ned

> > >> OLD
> > >>    If the from field contains more than one address (mailbox or group) in the
> > >>    address-list, then the sender field, containing the field name "Sender" and a
> > >>    single mailbox or group specification, MUST appear in the message.
> > >
> > >> NEW
> > >>    If the from field contains more than one address (mailbox or group) in the
> > >>    address-list, then the sender field, containing the field name "Sender" and a
> > >>    single mailbox or group specification that refers to no more than
> > >>    one mailbox, MUST appear in the message.
> > >
> > > <pedant>
> > >
> > > This only covers the case where the from: contains more than one address. What
> > > about the case where the from is a single address but different from the
> > > sender?
> > >
> > > </pedant>

> > He-he-he.

> > Yes, so I'll also add that to the end of the paragraph after the grammar:

> > OLD
> >    Otherwise, both fields SHOULD appear.

> > NEW
> >    Otherwise, both fields SHOULD appear.  If the "Sender:" field
> >    specifies a group, that group SHOULD NOT refer to more than
> >    one mailbox.

> > (Q: "SHOULD NOT", or "MUST NOT"?)

> I think MUST NOT is appropriate here.

> 				Ned
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