Postfix smtpd

220 qs235.is.cc ESMTP Postfix (Ubuntu)
250-qs235.is.cc
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:
            08:bb:3c:4c:17:82:de:f9:7e:ab:00:c8:60:8d:1c:8c:ba:b8:e4:e3
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: CN=qs235.is.cc
        Validity
            Not Before: Jun 15 13:29:14 2020 GMT
            Not After : Jun 13 13:29:14 2030 GMT
        Subject: CN=qs235.is.cc
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:b6:ed:20:39:30:ac:80:72:bd:41:85:ce:d5:4b:
                    ba:51:1e:5d:a3:51:ee:04:97:ed:6f:5b:de:4f:b7:
                    f7:d7:e3:20:87:9a:74:cf:bc:17:fe:7f:bf:9b:36:
                    d0:c5:ce:d9:30:e3:27:21:eb:9d:c6:49:6e:ed:dd:
                    23:19:27:58:1e:b9:c2:e2:51:6b:98:2a:71:c0:9b:
                    93:2e:0d:7d:a0:cb:a5:8c:8a:9c:ef:f2:ce:ac:f5:
                    e3:b4:ed:af:00:8b:cd:fd:e0:fb:d5:4a:e7:af:eb:
                    86:ae:85:7a:25:26:7e:86:4c:ff:81:cb:c0:f2:7f:
                    e0:e4:a8:18:a9:d9:9e:10:3d:db:75:94:88:f2:cf:
                    ec:aa:f3:9a:10:61:0f:7d:52:5f:12:47:67:61:fe:
                    4f:17:f9:3e:81:cd:fd:25:b8:bc:1a:ee:ac:b1:5e:
                    47:8b:8f:2b:5f:6b:d5:7b:9a:a9:91:8d:00:e4:dc:
                    95:93:ac:a4:6a:46:ad:ee:e6:ff:d2:2f:58:99:88:
                    f1:e8:5c:33:63:21:61:c6:f4:9a:d0:05:1b:89:aa:
                    18:5e:6a:dc:d1:cc:12:e1:0e:07:bf:6b:af:9a:b2:
                    47:10:2e:77:fe:d3:6d:54:ba:dc:9c:6a:5d:27:e0:
                    51:5c:1f:92:5d:32:44:b2:da:ab:5c:07:c4:c8:76:
                    4b:29
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Basic Constraints: 
                CA:FALSE
            X509v3 Subject Alternative Name: 
                DNS:qs235.is.cc
    Signature Algorithm: sha256WithRSAEncryption
    Signature Value:
        9c:50:1d:d6:4e:5f:7a:0a:83:27:37:7f:62:4f:9e:8f:ec:0b:
        62:f4:d5:f9:41:ca:56:ca:9d:49:31:3a:27:e9:7b:00:9b:ac:
        ee:0c:72:fe:e8:a2:07:56:0d:32:f1:ac:6b:e4:9d:4d:12:dc:
        ee:fb:5a:94:45:cc:1b:8a:ff:53:44:86:81:5d:11:77:c4:4a:
        a9:cf:89:22:cb:5d:97:77:df:50:fb:77:65:55:aa:74:6c:2c:
        70:a2:b1:ad:cf:50:2a:64:de:ef:dd:65:f8:28:fc:1b:cf:ea:
        05:d9:b3:51:a4:43:8b:5f:ff:e5:0e:c3:07:54:13:45:0a:40:
        8e:25:fd:3a:20:cb:8f:36:e0:de:cd:2e:46:3b:81:07:f6:d1:
        68:c6:1c:e1:19:1b:a8:85:c1:ae:fb:4b:0b:f9:c6:11:0b:7b:
        0c:f2:b4:ae:b7:59:75:70:53:64:d8:74:04:49:58:76:b1:c5:
        00:e2:9a:f6:3f:b2:e4:26:b0:e1:57:08:71:e7:a9:76:7f:63:
        ac:e7:bf:70:64:55:6f:d2:10:34:66:27:b3:8f:ff:04:50:f0:
        93:e8:2c:95:2b:12:26:b3:91:6c:55:f9:35:76:c4:6e:25:c4:
        7e:47:48:c5:15:84:68:21:d9:7c:ed:6b:a9:7f:f0:b8:4c:6a:
        fd:69:e2:b9