Postfix smtpd

220 othello.micnet.ne.jp ESMTP Postfix (Debian/GNU)
250-othello.micnet.ne.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:
            6c:63:94:7e:32:ce:e5:c0:f0:59:fe:81:77:f2:ae:97:83:d1:5f:ef
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: CN=othello.micnet.ne.jp
        Validity
            Not Before: Nov 26 04:43:03 2019 GMT
            Not After : Nov 23 04:43:03 2029 GMT
        Subject: CN=othello.micnet.ne.jp
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:a8:af:f0:ff:0b:57:69:55:90:fe:44:d7:11:0a:
                    ff:88:49:63:e2:75:7f:95:a7:5b:50:0c:54:2c:25:
                    b4:1b:4c:61:ee:07:5a:34:c5:5e:70:02:c0:04:c0:
                    7e:26:e4:bd:32:a3:8c:a6:8e:ac:b9:9a:59:5d:c8:
                    4f:b4:0f:c9:4a:ca:32:0a:ef:97:50:ab:4d:77:04:
                    e0:72:84:76:f2:dc:08:c4:18:aa:bc:c2:3e:99:ee:
                    25:7b:6b:4b:66:08:56:8f:6b:b5:28:ac:29:e4:a4:
                    69:9d:f4:df:60:f7:91:65:93:ba:3d:c0:fd:91:5d:
                    20:99:f3:de:c3:f6:54:03:71:36:d7:62:49:b5:8f:
                    3a:a3:07:67:8d:67:eb:29:83:70:e4:48:5a:42:a9:
                    ec:21:c0:0f:21:2f:d8:61:6a:4d:c1:01:ed:43:8e:
                    b8:de:82:42:00:bb:d5:45:0f:ad:db:8f:18:75:f5:
                    c1:b7:6a:e8:f0:81:ce:ab:5a:e3:54:6f:8a:6b:00:
                    fd:53:bd:90:9f:6b:2b:ab:8a:c1:7f:a8:5b:22:8d:
                    4e:5e:1b:44:d2:aa:c7:3f:fe:6b:86:c8:00:73:f4:
                    ae:e6:1f:bf:a9:24:5e:bb:24:7d:a3:e8:9c:ce:ee:
                    7d:65:83:d3:2c:50:65:d0:5e:4d:c1:b6:b7:ac:62:
                    ee:15
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Basic Constraints: 
                CA:FALSE
            X509v3 Subject Alternative Name: 
                DNS:othello.micnet.ne.jp
    Signature Algorithm: sha256WithRSAEncryption
    Signature Value:
        92:d5:5c:17:84:d5:40:06:12:7b:81:c1:8f:18:f9:62:6f:be:
        a8:b7:71:4e:46:29:ba:31:ac:4a:e7:96:07:aa:ef:b7:3e:1d:
        01:c1:78:28:b0:5b:03:4e:26:5a:f8:5b:53:b1:0f:93:de:d4:
        1c:0f:25:be:4e:a1:00:65:c6:ed:6f:ad:97:56:24:b0:e5:ad:
        b3:de:31:07:c6:d5:18:8b:ea:81:91:0a:ea:ca:eb:53:7f:b3:
        4b:50:a4:ea:75:72:6a:8d:1b:4a:52:69:36:98:ae:71:9e:4e:
        6d:0d:f1:c0:69:1c:22:3f:05:1e:fd:ef:f4:77:08:00:1c:7b:
        36:9d:46:44:a2:63:29:cc:69:46:5c:28:1a:d6:42:bd:ca:d9:
        3d:da:f1:1e:37:b0:75:bb:4e:ee:48:c1:9c:07:33:4d:d1:32:
        db:c1:d1:5c:10:0a:ea:d6:9d:19:b2:8c:9b:2c:53:55:a0:c9:
        5d:1d:b8:f8:95:e8:09:c8:98:3d:04:5b:db:9e:5f:d7:46:bc:
        c0:74:a4:5f:46:fc:63:39:47:b4:c4:d9:d8:58:06:0b:9e:b1:
        71:be:7b:3e:77:05:16:bf:bb:66:d6:bb:60:83:14:e2:02:cb:
        75:b2:f3:6d:e0:99:cd:e7:d7:48:37:d0:73:b0:db:88:be:8a:
        d9:6d:84:9e