On Friday, September 5, 2014 8:27:12 PM CEST, Steffen Nurpmeso wrote:
I don't know how many messages are sent over SMTP each day, but it
would be interesting to know how much energy all those useless
roundtrip packets consume which are necessary to get upgrade
a SMTP session via STARTTLS, and how many percent of those
connections could also instantiate a non-existent SMTPS instead,
not requiring these upgrades.
Practically zero and who cares.
TLS negotiation doesn't grow more expensive if you send a few bytes of
cleartext before the client hello.
Arnt
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