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Re: [ietf-smtp] Proposal: SMTP Early Pipelining

2018-09-02 12:32:08
Assuming that TLS is used (which the IETF considers to be necessary by default, right?), then I think practically the same effect could be reached by:

1. Permit immediate STARTTLS, without waiting for the banner or EHLO.
2. Let the client send (AUTH+)MAIL+RCPT+DATA in one batch inside TLS.
3. Require TLS 1.3 support for compliant clients/servers.

Given that, a client should only need to wait for one roundtrip during STARTTLS and for one roundtrip during DATA.


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