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Re: comast email issues, who else has them?
On Mon, 11 Sep 2006, william(at)elan.net wrote: > On Mon, 11 Sep 2006, Tony Finch wrote: > > > > Far better to use a Received: header stating HTTP in the "with" > > protocol field. (And the IANA registry should be updated to include > > that as one of the standard values.) > > That suggestion is likely to be contrary to SMTP design. Received trace > fields are for use of recording of where data that was RFC2822 formatted > came from and how. Use of these fields also assumes that start of email > transmission took place somewhere else. I'm not entirely convinced by that argument. You could squint a bit and view webmail as a sort of gatewaying, in which case it makes sense to map webby concepts onto 821 and 822 as accurately as possible. The other reason for using Received: for this kind of job is it scales better to other submission methods: what about an XMPP-to-email gateway, for example? It would be madness to define ad-hoc X- headers for each submission protocol. > The "with" clause in Received is used to indicate the "transport" > protocol but assumes that data itself is already properly formatted > (compare to that the same type of L7 protocol can use either TCP or UDP; > this is not perfect fit but gives you some idea). What about "with MMS" where the message format is not (quite) 822? > If you really want to indicate the source of transmission for non-SMTP > origination point, the best is to create new trace field for this purpose. > With Received the closest clause would be "via" but I think via is largely for > use with complete message being gatewayed through non-SMTP protocol and this > is probably not the correct use of it either. The only non-TCP via defined at the moment is UUCP, which I guess implies batch SMTP - i.e. "via" is the level under the message transport protocol. Tony. -- f.a.n.finch <email@example.com> http://dotat.at/ FISHER: WEST OR NORTHWEST 4 OR 5 BECOMING VARIABLE 3 OR 4. FAIR. MODERATE OR GOOD.