Hi ! After installing ssldump, I could compare windows xp and windows 7 clients STARTTLS negotiation.
While the windows 7 used TLS_RSA_WITH_AES_128_CBC_SHA via TLSv1/SSLv3 Windows XP output is New TCP connection #1: 10.0.0.252(5000) <-> my.server (25) 1 1 0.0182 (0.0182) C>S SSLv2 compatible client hello Version 3.1 cipher suites TLS_RSA_WITH_RC4_128_MD5 TLS_RSA_WITH_RC4_128_SHA TLS_RSA_WITH_3DES_EDE_CBC_SHA SSL2_CK_RC4 SSL2_CK_3DES SSL2_CK_RC2 TLS_RSA_WITH_DES_CBC_SHA SSL2_CK_DES TLS_RSA_EXPORT1024_WITH_RC4_56_SHA TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA TLS_RSA_EXPORT_WITH_RC4_40_MD5 TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 SSL2_CK_RC4_EXPORT40 SSL2_CK_RC2_EXPORT40 TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA TLS_DHE_DSS_WITH_DES_CBC_SHA TLS_DHE_DSS_EXPORT1024_WITH_DES_CBC_SHA 1 2 0.0188 (0.0005) S>C Handshake ServerHello Version 3.1 session_id[32]= 3e d1 e3 37 a1 47 c0 87 ff 1c 8b bf ab f3 fa 94 f7 da e7 27 d1 54 cf 10 95 ad ec c9 b4 90 b1 6d cipherSuite TLS_RSA_WITH_RC4_128_MD5 compressionMethod NULL 1 3 0.0188 (0.0000) S>C Handshake Certificate 1 4 0.0202 (0.0014) S>C Handshake1 5 0.0202 (0.0000) S>C Handshake1 0.0229 (0.0026) C>S TCP FIN 1 0.0230 (0.0001) S>C TCP FIN New TCP connection #2: 10.0.0.252(1025) <-> my.server(25) 2 60.0266 (60.0266) C>S TCP FIN 2 60.0267 (0.0000) S>C TCP FIN So how can I enable SSLv2 support ? Is it on openssl or sendmail ? Any help appreciated. Thanks and regards David