Re: [yam] Issue #10: RFC 5321 3.9: add tiny subsection

[SM <[e-mail]>]

Hi Alessandro,
At 00:08 08-12-2009, Alessandro Vesely wrote:
>No, it's a tentative guess. That section currently contributes to 
>make it ill-defined. Eliding the term or replacing it with "mailing 
>lists" may better that state of affairs with minimal changes. 
>Alternatively, slightly restructuring the section may be an occasion 
>to reword it and also restate the concept of forwarding and its implications.

 From Section 2.1:

   "In other words, message transfer can occur in a single connection
    between the original SMTP-sender and the final SMTP-recipient, or can
    occur in a series of hops through intermediary systems."

I gather that you are viewing "forwarding" as when the final 
SMTP-recipient being changed by an intermediary system.  In technical 
terms, we could have different types of forwarding; for example the 
address correction in Section 3.4.  Section 3.7.2 also discusses 
about forwarding where the message goes through a gateway.  From an 
implementation perspective, we might talk about aliases, as mentioned 
in Section 3.9.1, or the .forward which can be set by a 
user.  There's also the case of this mailing list which forwarded 
your message to me.  Section 3.9.2 refers to that as "redistribution".

The main problem doesn't seem to be with forwarding; it's more about 
the return path and/or authorization.  It's up to the WG to determine 
whether restating all that would be a minimal change.

Regards,
-sm