Postfix smtpd

220 lxd12.cynet.co.jp ESMTP Postfix (Ubuntu)
250-lxd12.cynet.co.jp
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250-SMTPUTF8
250 CHUNKING

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            83:5e:0d:9a:ac:bc:9d:75
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: CN=lxd09.cynet.co.jp
        Validity
            Not Before: Jan 13 06:27:30 2020 GMT
            Not After : Jan 10 06:27:30 2030 GMT
        Subject: CN=lxd09.cynet.co.jp
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:af:99:83:14:9d:86:02:dd:5c:74:5d:d0:b4:0e:
                    65:47:66:7d:c0:38:60:ae:52:5d:79:cd:24:94:c8:
                    df:67:a1:d5:71:cf:0a:37:87:54:f0:02:f8:77:31:
                    05:c9:e9:f9:90:52:2b:5e:e7:89:d4:82:03:8e:19:
                    ef:48:56:18:c9:ee:7b:4c:96:55:ad:71:4a:6f:55:
                    c9:1c:b7:cd:59:8c:b5:26:05:85:ac:c5:3b:7e:89:
                    f9:11:18:d3:69:8c:7d:01:c2:7a:c0:20:6d:d9:88:
                    ea:69:ea:a7:73:96:3f:aa:5b:91:7b:5f:b4:95:d7:
                    10:67:9d:35:d3:b3:ea:be:93:c4:33:4c:43:18:87:
                    e9:6b:4e:d4:45:8e:fa:05:d7:ac:ce:95:aa:04:30:
                    56:74:4f:9c:00:71:53:89:84:ce:8d:63:aa:dd:66:
                    6b:09:9d:20:d0:1c:a4:a5:da:44:a1:e2:16:88:13:
                    66:2f:d0:50:92:43:73:d8:85:93:ba:1d:25:03:be:
                    fb:69:af:4f:29:be:44:99:93:f2:6b:0f:75:c5:4d:
                    d8:23:ed:40:3c:69:05:be:eb:e8:2d:20:3b:d3:61:
                    2f:98:77:4a:ce:a3:53:0b:65:1f:2e:ba:d9:d7:fb:
                    a1:b2:bf:3b:31:41:55:a1:22:34:35:7b:92:89:82:
                    12:3b
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Basic Constraints: 
                CA:FALSE
            X509v3 Subject Alternative Name: 
                DNS:lxd09.cynet.co.jp
    Signature Algorithm: sha256WithRSAEncryption
    Signature Value:
        5c:5d:cf:73:43:b1:d8:96:6b:ed:33:2b:98:fd:6e:64:00:46:
        5e:80:cb:f1:51:09:3e:99:8d:fb:6a:e6:3d:98:83:65:74:fa:
        3a:4d:ef:60:83:d3:21:e6:fb:82:4b:8f:4c:bc:42:dc:17:d1:
        c5:32:60:6d:46:83:78:89:18:e8:a4:de:e1:9d:49:0c:2a:e1:
        27:46:ac:8a:9b:1a:4c:d0:07:0e:67:9d:ae:dc:10:96:2d:f5:
        0d:01:11:33:3e:10:8e:c6:03:68:28:a5:d6:a9:3b:09:8f:78:
        7f:c7:f2:be:b0:88:a5:5c:fb:58:a6:e7:f8:24:e4:39:3d:fa:
        46:cc:fa:15:93:a2:df:36:74:07:14:75:f6:f2:5e:13:a6:92:
        28:b6:3d:50:f0:9f:51:b8:1f:5f:84:6c:32:cf:66:48:38:0b:
        44:b4:47:38:7a:c0:4e:d4:ac:74:6e:2b:bc:ae:42:71:62:b4:
        67:e8:cc:a0:ea:b4:27:f7:7f:2a:2c:c7:e6:02:9a:f2:5a:30:
        3f:4a:ea:ca:08:03:e7:cc:a9:8d:88:99:0c:70:45:85:f6:65:
        be:b7:1e:d0:22:6f:95:f2:80:df:a5:59:9d:07:50:63:b6:de:
        b2:60:b8:06:17:ac:e1:b9:66:41:a7:6e:cb:de:d8:66:53:e7:
        c0:06:68:ca