Re: tls vs ssl

From: Wietse Venema (no email)
Date: Tue Mar 02 2010 - 12:52:41 EST

  • Next message: Alex: "Re: Postfix TLS requirements"

    Charles Marcus:
    > On 2010-03-02 2:51 AM, Stan Hoeppner wrote:
    > > You've likely been using STARTTLS only, which doesn't require a key exchange
    > > as SSL/TLS does.
    >
    > ? You sure about that? I use only STARTTLS, and I always have to do the
    > 'Confirm Security Exception' dance to accept the certificate the first
    > time I send a message in Thunderbird...

    Port 24 and 587:

        TCP handshake,
            SMTP handshake, client sends STARTTLS,
                TLS handshake, SMTP handshake, MAIL transaction, ...

    Port 465:

        TCP handshake,
            TLS handshake, SMTP handshake, MAIL transaction, ...

    Details are in RFC 3207.

            Wietse


  • Next message: Alex: "Re: Postfix TLS requirements"





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