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.

Barry
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