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

>> 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"?)

Barry
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