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

> > It occurs to me that now that sender has changed from
> >
> >     sender = mailbox
> > to
> >     sender = address
> >
> > Since address can be a group, and a group can contain multiple addresses, we've
> > left a crack through which the syntax allows multiple address to slip into a
> > sender field.
> ...
> > I think a note to the effect that at most one
> > address can appear in a sender group construct would suffice.

> I have this change queued up:

> 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>

				Ned
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