[ietf-dkim] DKIM on envelope level
markd+dkim at yahoo-inc.com
Thu Oct 29 09:42:06 PDT 2009
On Oct 29, 2009, at 9:11 AM, Dave CROCKER wrote:
I'm guessing the incentive for all of this is to reduce bandwidth,
otherwise why not just issue the 4XX/5XX after the DATA/. sequence
rather than invent a new mechanism to issue the same response at the
envelope end of the transaction?
> First blank line after DATA.
If the proposal is an attempt to reduce SMTP bandwidth, which is
becoming a vanishingly small part of Internet traffic for most sites
anyway, then stopping after DATA doesn't help as your OS will have
likely received a socket buffer full of data, even if the application
doesn't read it. So it might make you feel good, but it doesn't reduce
the bytes coming down the line consequentially.
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