Am 08.03.2014 01:11, schrieb Glenn English:
>> Secure Renegotiation IS supported
>> Compression: zlib compression
>> Expansion: zlib compression

let me guess: BSD as operating system
there where a lot of posts recently that this is a problem
honestly you should always disable compression in con text of TLS

http://www.postfix.org/TLS_README.html

LEGACY_SERVER_CONNECT
    See SSL_CTX_set_options(3).
NO_TICKET
    See SSL_CTX_set_options(3).
NO_COMPRESSION
    Disable SSL compression even if supported by the OpenSSL library. 
Compression is CPU-intensive, and compression
before encryption does not always improve security.

Example:

    /etc/postfix/main.cf:
        tls_ssl_options = no_ticket, no_compression

You should only enable features via the hexadecimal mask when the need to 
control the feature is critical (to deal
with a new vulnerability or a serious interoperability problem). Postfix DOES 
NOT promise backwards compatible
behavior with respect to the mask bits. A feature enabled via the mask in one 
release may be enabled by other means
in a later release, and the mask bit will then be ignored. Therefore, use of 
the hexadecimal mask is only a
temporary measure until a new Postfix or OpenSSL release provides a better 
solution.

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