On Fri, Sep 13, 2013 at 09:44:38PM +0200, Mathieu R. wrote:

> Sep 13 21:31:34 effraie01 postfix/smtpd[12650]: SSL_accept error
> from ng17.bullet.mail.bf1.yahoo.com

There is generally more information in the log than this when the
TLS handshake fails.  DO NOT over-summarize the logs.

> (ever from yahoo servers)
> i can't figure out wher my mistake come from.

Record a full packet PCAP file containing a session from a Yahoo
host.  Filter this capture file to contain full packets from exactly
one TCP session.  Run that through wireshark, see where in the TLS
handshake the problem starts.  Make the full capture available (post
a URL, ...).

> here is my postconf -n : http://paste.debian.net/39693/
> postfix version is : 2.9.6-2 (debian stable package)
> 
> can please somebody give me some help (i fear loosing some emails
> from yahoo)

TLS to your domain looks good when I test.  Your server certificate
is self-signed, but that's hardly unique to you.

The expiration date on the self-signed cert could arguably give
some systems indigestion, perhaps a 2-10 year lifetime is more
reasonable than 1000 years.

Certificate:
    Data:
        Version: 1 (0x0)
        Serial Number:
            b5:81:fb:cf:95:9e:77:db
        Signature Algorithm: sha1WithRSAEncryption
        Issuer: C=FR, ST=France, L=Paris, O=effraie.org, OU=effraie.org, 
CN=effraie.org/emailAddress=r...@effraie.org
        Validity
            Not Before: Sep 13 18:28:24 2013 GMT
            Not After : Jan 14 18:28:24 3013 GMT
        Subject: C=FR, ST=France, L=Paris, O=effraie.org, OU=effraie.org, 
CN=effraie.org/emailAddress=r...@effraie.org
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (1024 bit)
                Modulus:
                    00:c4:59:01:87:4a:39:ad:c9:81:42:78:f0:01:2f:
                    ef:b0:56:d9:0b:96:7d:ef:28:4a:d1:68:63:33:dd:
                    17:2c:08:3c:ac:be:93:f0:dd:11:e0:4a:33:19:77:
                    b1:aa:0d:21:d5:08:3e:ff:c6:43:68:11:22:52:b4:
                    e9:30:df:08:b1:c3:20:a7:3f:ea:a3:3b:48:ed:fb:
                    6c:41:f0:4d:c4:8a:f2:d9:be:32:e4:7d:b8:91:66:
                    a7:14:61:95:e3:9f:a6:d3:b2:18:7a:5d:1f:4a:84:
                    1a:e3:20:96:c3:5a:91:d8:cc:14:02:a5:df:7a:ea:
                    6f:fe:e9:79:83:d2:59:0b:a1
                Exponent: 65537 (0x10001)
    Signature Algorithm: sha1WithRSAEncryption
        76:2a:93:c9:0a:6a:1a:2f:ba:d1:a2:70:05:01:33:a6:fb:d4:
        1f:ae:05:bb:92:1c:a1:b7:4b:f9:ec:18:6e:a1:1c:2e:ae:16:
        e2:14:8a:b6:b3:d0:38:72:63:ee:a4:e4:da:ac:5b:66:9f:79:
        8e:87:ee:bd:c5:ec:dc:94:20:0b:0f:a0:19:53:72:cc:60:62:
        a1:99:b7:1c:b3:56:bf:5a:b1:52:3a:a5:18:b9:31:fa:8f:05:
        0a:3b:86:6a:10:59:bd:9f:bf:d3:4c:41:b8:db:c9:dd:73:c9:
        41:61:07:31:8a:e6:dc:6d:09:1b:28:69:8d:12:ab:43:51:4b:
        da:91
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

-- 
        Viktor.

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