+OK Hello there.
+OK Here's what I can do:
TOP
USER
LOGIN-DELAY 10
PIPELINING
UIDL
IMPLEMENTATION Courier Mail Server
.

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            ac:a6:7a:d2:03:06:38:ee:2d:ce:8e:84:5b:82:99:a6
        Signature Algorithm: sha384WithRSAEncryption
        Issuer: C=JP, O=CloudSecure Corporation, CN=CloudSecure RSA Domain Validation Secure Server CA 2
        Validity
            Not Before: Mar 11 00:00:00 2024 GMT
            Not After : Apr 11 23:59:59 2025 GMT
        Subject: CN=*.xserver.jp
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:a9:d0:1d:53:aa:5b:43:5b:0c:d0:8a:80:40:4b:
                    c5:d4:1e:05:4c:3f:00:0c:d1:a0:56:3a:b3:38:b9:
                    4d:f9:6d:11:5e:bb:cc:72:82:f4:da:d0:8b:bb:19:
                    ee:96:06:02:dd:69:b8:96:4a:78:de:8e:bd:a2:25:
                    a9:54:50:28:5c:32:ea:4b:d6:0a:27:74:d0:48:eb:
                    de:83:56:b7:5c:c9:7b:d8:87:e3:75:2e:c7:dc:76:
                    c4:92:03:cc:db:75:a1:c4:84:26:32:0a:4e:65:f6:
                    86:22:7c:24:e2:e4:40:13:19:c0:e0:e9:6c:2d:a7:
                    75:80:93:25:d2:b4:d0:78:a7:69:3e:49:d1:23:2c:
                    21:7f:83:a2:bc:a8:b3:3f:c2:aa:e2:e5:df:7a:66:
                    1f:38:73:bd:7e:25:5b:fc:76:e5:12:23:92:8d:9d:
                    57:7c:3f:6a:1a:d5:f6:24:a4:2c:dc:aa:ba:55:b8:
                    2e:d0:6d:d1:42:94:15:5a:5e:6e:99:19:70:a5:32:
                    94:86:c5:39:a7:ed:b8:e5:71:8a:ab:43:92:d1:b8:
                    ec:21:38:4c:c4:e4:d7:a0:5e:3f:ab:fd:77:c0:d6:
                    d0:cb:79:ff:d5:24:3b:68:fa:82:72:c5:7d:d6:57:
                    0f:af:83:d0:22:c8:7c:16:2b:65:0a:89:95:75:8a:
                    87:6b
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Authority Key Identifier: 
                38:A7:FA:EA:10:9C:AF:30:72:B9:8F:DB:93:3E:96:B0:43:D6:96:81
            X509v3 Subject Key Identifier: 
                91:7E:F0:6F:A2:62:FA:E9:D0:85:52:EE:61:7D:07:D3:83:85:51:89
            X509v3 Key Usage: critical
                Digital Signature, Key Encipherment
            X509v3 Basic Constraints: critical
                CA:FALSE
            X509v3 Extended Key Usage: 
                TLS Web Server Authentication, TLS Web Client Authentication
            X509v3 Certificate Policies: 
                Policy: 1.3.6.1.4.1.6449.1.2.2.50
                  CPS: https://sectigo.com/CPS
                Policy: 2.23.140.1.2.1
            Authority Information Access: 
                CA Issuers - URI:http://crt.sectigo.com/CloudSecureRSADomainValidationSecureServerCA2.crt
                OCSP - URI:http://ocsp.sectigo.com
            X509v3 Subject Alternative Name: 
                DNS:*.xserver.jp, DNS:xserver.jp
            CT Precertificate SCTs: 
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : CF:11:56:EE:D5:2E:7C:AF:F3:87:5B:D9:69:2E:9B:E9:
                                1A:71:67:4A:B0:17:EC:AC:01:D2:5B:77:CE:CC:3B:08
                    Timestamp : Mar 11 07:38:09.735 2024 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:45:02:21:00:A9:13:FF:9C:ED:90:1E:4F:8E:9A:2E:
                                96:6B:60:99:0A:B5:BD:08:72:92:1E:15:AD:E3:A4:1E:
                                C4:79:EC:8B:3F:02:20:3B:62:46:29:EF:95:F4:27:39:
                                16:D2:95:9C:7F:3C:B3:DB:53:F9:C8:BB:8A:C7:99:54:
                                6E:12:4B:61:11:EC:A4
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : A2:E3:0A:E4:45:EF:BD:AD:9B:7E:38:ED:47:67:77:53:
                                D7:82:5B:84:94:D7:2B:5E:1B:2C:C4:B9:50:A4:47:E7
                    Timestamp : Mar 11 07:38:09.660 2024 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:44:02:20:2E:00:B7:15:FC:2C:79:0B:2D:91:30:C1:
                                EF:86:42:B4:64:76:54:60:F9:1A:96:E2:B9:03:3A:BD:
                                17:27:77:EF:02:20:50:AE:C2:9B:A0:58:E6:67:46:B5:
                                CF:E4:4B:71:D8:DC:D1:CE:6F:A2:14:53:E6:BA:75:35:
                                79:D8:C6:B9:50:08
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : 4E:75:A3:27:5C:9A:10:C3:38:5B:6C:D4:DF:3F:52:EB:
                                1D:F0:E0:8E:1B:8D:69:C0:B1:FA:64:B1:62:9A:39:DF
                    Timestamp : Mar 11 07:38:09.644 2024 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:46:02:21:00:F8:0D:6E:FA:CC:AC:8A:BD:B7:14:C0:
                                53:75:03:9A:89:15:CF:04:E5:51:42:02:D2:DA:7B:E1:
                                81:47:E2:D4:D7:02:21:00:B3:9D:2D:3F:6A:36:88:9D:
                                95:70:B0:DC:18:B8:3C:B5:C4:E4:29:57:C4:60:5A:07:
                                49:76:77:37:36:D5:66:3C
    Signature Algorithm: sha384WithRSAEncryption
    Signature Value:
        34:3f:cb:dc:1b:f2:f5:6b:f5:d0:cc:b7:8e:24:69:bb:48:55:
        de:8e:58:a3:04:af:14:b1:ad:58:fe:40:bc:4f:b9:94:4d:3a:
        4b:52:04:0f:74:87:1f:63:e1:28:ba:15:41:a8:11:a5:00:a7:
        b4:84:89:4e:68:da:88:00:22:96:f2:d0:42:c2:42:a7:33:f9:
        85:39:d5:2c:7a:c2:de:42:e2:58:62:55:cd:d9:07:76:ae:f7:
        c1:56:f9:8d:a2:a4:7f:3b:49:3f:3f:93:5d:e5:ce:39:e6:a9:
        9f:24:39:00:34:28:4e:20:23:d7:d7:fc:8b:f0:ba:51:79:61:
        15:49:95:ad:19:e4:0d:5d:d6:6e:33:c1:84:f6:6d:98:46:ef:
        ec:e5:5e:8e:52:6d:8a:3a:c5:38:95:1c:93:2d:a8:b5:38:24:
        fe:a7:d6:62:8e:58:f1:97:85:20:bd:80:17:fd:d5:07:3c:87:
        7c:60:8f:f2:73:92:0d:0e:2c:cc:5c:63:7e:e0:8c:5b:7f:20:
        84:1e:11:0d:27:95:cc:00:68:90:b4:57:c1:e1:b0:8c:33:01:
        aa:3f:ec:43:fc:b2:02:47:d1:d0:5f:b5:19:95:88:5d:89:cb:
        76:ec:da:69:2d:a0:94:47:4e:0e:25:a1:57:0f:82:7a:ad:1f:
        fc:77:cc:98:61:aa:ba:ad:3a:fe:b0:3e:5d:29:c4:9c:6e:52:
        2d:9a:3f:25:29:a3:5b:17:86:0d:67:e7:55:f3:c5:ba:79:d6:
        e3:26:3c:79:d3:76:21:f1:42:a9:34:2d:a8:4f:f8:d9:2f:7a:
        33:fc:b3:18:26:ab:7f:4d:15:eb:9d:ec:5e:b5:4c:18:9e:6b:
        7d:7e:0e:51:bf:91:96:31:07:55:6e:bf:fc:10:4a:30:51:26:
        dd:5e:7e:0f:ed:c0:c1:3f:7e:58:16:3e:8b:07:f5:1e:f8:b1:
        73:2e:35:45:63:52:6f:0b:41:43:1b:c6:7f:7b:5d:7b:ff:89:
        43:5d:99:2c:cc:00