Dave CROCKER wrote:
> First blank line after DATA.
>
> Whether that affords sufficient value-add is an open question to me and
> probably
> others.
There is no doubt it has value whether you got it at DATA (up to the
first blank) or received the entire payload.
The difference is a question of overhead savings which SMTP does not
allow because a receiver can not DROP at the first blank due to some
clear DKIM/SMTP verification/policy failure. To do so creates an
implicit 451 retransmission problem.
See the discussion in IETF-SMTP about this very issue:
http://www.imc.org/ietf-smtp/mail-archive/msg05781.html
--
HLS
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