Established a TCP connection with 47.246.137.48:25. 
But, I was not able to retrieve a respone  or speak SMTP with the daemon. 

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            1e:cd:6e:e7:34:02:f4:48:74:80:31:a5
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: C = BE, O = GlobalSign nv-sa, CN = GlobalSign GCC R3 OV TLS CA 2024
        Validity
            Not Before: Dec  3 03:50:01 2024 GMT
            Not After : Sep  4 00:00:00 2025 GMT
        Subject: C = CN, ST = ZheJiang, L = HangZhou, O = "Alibaba (China) Technology Co., Ltd.", CN = mail.aliyun.com
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:ac:03:e4:5b:56:ab:31:dc:e5:b2:96:d3:06:87:
                    9a:24:c2:52:fb:79:ec:6c:8b:f6:08:19:6e:df:86:
                    23:f7:f9:7e:44:56:6e:fe:47:55:d8:b5:8d:89:f3:
                    d9:61:ed:7c:cc:43:0c:a4:e2:7c:4f:e9:24:d6:ab:
                    1a:46:4a:28:a9:1e:5b:6b:e2:89:99:88:fa:91:04:
                    eb:ea:23:11:56:11:ff:34:5b:53:b8:57:10:12:1c:
                    10:85:73:01:c9:02:76:7f:fe:d7:11:f3:10:a6:14:
                    e3:bc:0c:d2:c4:df:07:79:4a:12:6e:1d:92:99:c6:
                    79:85:48:b3:9d:57:1a:74:87:05:64:ca:38:3b:63:
                    99:f7:77:3a:ce:4b:2a:cc:29:30:bd:b0:2b:ca:de:
                    5f:17:32:6a:5f:14:29:98:13:e4:14:fc:48:2e:bc:
                    76:91:56:66:51:7a:7f:e5:e7:61:5a:58:6b:46:f5:
                    c5:52:9f:76:ca:dd:88:d2:a5:17:81:fb:90:b5:d6:
                    ed:52:26:8d:d0:d2:0b:e3:75:dd:4c:01:81:3e:32:
                    ba:74:45:01:e7:f8:d1:c6:6a:7a:b3:ca:4d:d1:c5:
                    44:cf:d0:b3:63:ab:49:f8:c7:2d:7d:7c:f7:da:80:
                    e5:06:e6:fc:2c:9f:f9:48:fb:4a:1a:c6:e0:de:93:
                    e6:dd
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Key Usage: critical
                Digital Signature, Key Encipherment
            X509v3 Basic Constraints: critical
                CA:FALSE
            Authority Information Access: 
                CA Issuers - URI:http://secure.globalsign.com/cacert/gsgccr3ovtlsca2024.crt
                OCSP - URI:http://ocsp.globalsign.com/gsgccr3ovtlsca2024
            X509v3 Certificate Policies: 
                Policy: 2.23.140.1.2.2
                Policy: 1.3.6.1.4.1.4146.10.1.2
                  CPS: https://www.globalsign.com/repository/
            X509v3 CRL Distribution Points: 
                Full Name:
                  URI:http://crl.globalsign.com/gsgccr3ovtlsca2024.crl
            X509v3 Subject Alternative Name: 
                DNS:mail.aliyun.com, DNS:alimail.alibaba.com, DNS:alimail-hybrid.aliyun.com, DNS:alimailws.alibaba-inc.com, DNS:alimei-api-40.alibaba.com, DNS:alimei-api-40.aliyun.com, DNS:alimei-api.alibaba.com, DNS:alimei-api.aliyun.com, DNS:alimei-api-sg.aliyuncs.com, DNS:alimei-api-us.alibaba.com, DNS:alimei-api-us.aliyun.com, DNS:alimei-auth-40.alibaba.com, DNS:alimei-auth.alibaba.com, DNS:alimei-auth.aliyun.com, DNS:alimei-auth.sg.aliyun.com, DNS:alimei-auth-sg.aliyuncs.com, DNS:alimei-auth-us.alibaba.com, DNS:alimei-auth.us.aliyun.com, DNS:alimei-content.alibaba.com, DNS:alimei-content.aliyun.com, DNS:alimei-content-sg.aliyuncs.com, DNS:alimei-content-us.alibaba.com, DNS:alimei-preview.alibaba.com, DNS:alimei-preview.aliyun.com, DNS:alimei-preview-sg.aliyuncs.com, DNS:alimei-preview-us.alibaba.com, DNS:alimei-pub-us.alibaba.com, DNS:alimei-sub-40.alibaba.com, DNS:alimei-sub.alibaba.com, DNS:alimei-sub.aliyun.com, DNS:alimei-sub-sg.aliyuncs.com, DNS:alimei-sub-us.aliyun.com, DNS:aliyunmx.mail.alibaba.com, DNS:autodiscover.alibaba-inc.com, DNS:autodiscover.mxhichina.com, DNS:ay29u.mx.alibaba-inc.com, DNS:caldav40.alibaba-inc.com, DNS:caldav.alibaba-inc.com, DNS:caldav.aliyun.com, DNS:caldav.mxhichina.com, DNS:caldav.sg.aliyun.com, DNS:caldavus.alibaba-inc.com, DNS:email.aliyun.com, DNS:email.mxhichina.com, DNS:ex40.alibaba-inc.com, DNS:ex.alibaba-inc.com, DNS:exmail.aliyun.com, DNS:exmobile40.alibaba-inc.com, DNS:exmobile.alibaba-inc.com, DNS:exmobileus.alibaba-inc.com, DNS:ex.mxhichina.com, DNS:ex-oversea.alibaba-inc.com, DNS:exus.alibaba-inc.com, DNS:groupmail.hichina.com, DNS:imap40.alibaba-inc.com, DNS:imap.alibaba.com, DNS:imap.alibaba-inc.com, DNS:imap.aliyun.com, DNS:imaphk.qiye.aliyun.com, DNS:imap-inc.alibaba-inc.com, DNS:imap-inc.aliyun.com, DNS:imap.mxhichina.com, DNS:imap.qiye.aliyun.com, DNS:imap.sg.aliyun.com, DNS:imapus.alibaba-inc.com, DNS:ldap40.alibaba-inc.com, DNS:ldap.alibaba-inc.com, DNS:ldap.mxhichina.com, DNS:ldap.sg.aliyun.com, DNS:ldapus.alibaba-inc.com, DNS:mail.alibaba-inc.com, DNS:mail.dingtalk.com, DNS:mailhelp.aliyun.com, DNS:mailhelp.mxhichina.com, DNS:mail.hichina.com, DNS:mailhw.mxhichina.com, DNS:mail-inc.qiye.aliyun.com, DNS:mail.mxhichina.com, DNS:mailopen-netdisk.aliyun.com, DNS:mailopen-ws.aliyun.com, DNS:mail.qiye.aliyun.com, DNS:mailservice.alibaba.com, DNS:mail.sg.aliyun.com, DNS:mailsso.aliyun.com, DNS:mailsso-beta.aliyun.com, DNS:mailsso.mxhichina.com, DNS:mailsso-personal.aliyun.com, DNS:mailsso.sg.aliyun.com, DNS:mailsso.us.aliyun.com, DNS:mailtry.alibaba-inc.com, DNS:mailus.alibaba-inc.com, DNS:mx01.mail.alibaba.com, DNS:mx02.mail.alibaba.com, DNS:mx03.mail.alibaba.com, DNS:mx1.alibaba-inc.com, DNS:mx1.aliyun.com, DNS:mx1.mail.aliyun.com, DNS:mx1.mail.aliyun-inc.com, DNS:mx1.mail.service.aliyun.com, DNS:mx1.qiye.aliyun.com, DNS:mx1.sg.aliyun.com, DNS:mx2.enterprise.china.alibaba.com, DNS:mx2.mail.aliyun.com, DNS:mx2.qiye.aliyun.com, DNS:mx2.sg.aliyun.com, DNS:mx3.enterprise.china.alibaba.com, DNS:mx3.qiye.aliyun.com, DNS:mx.enterprise.china.alibaba.com, DNS:mx.hk.alibaba-inc.com, DNS:mx-inc.alibaba-inc.com, DNS:mxn.mxhichina.com, DNS:mxus1.alibaba-inc.com, DNS:mxus.mail.alibaba.com, DNS:mxus.mxhichina.com, DNS:mxw.mxhichina.com, DNS:pop3.alibaba-inc.com, DNS:pop3.aliyun.com, DNS:pop3.aliyun-inc.com, DNS:pop3.mxhichina.com, DNS:pop40.alibaba-inc.com, DNS:pop.alibaba.com, DNS:pop.qiye.aliyun.com, DNS:pop.sg.aliyun.com, DNS:popus.alibaba-inc.com, DNS:pre-alimei-api-40.aliyun.com, DNS:pre-alimei-api.aliyun.com, DNS:pre-alimei-api-sg.aliyuncs.com, DNS:pre-alimei-api-us.aliyun.com, DNS:pre-alimei-auth.aliyun.com, DNS:pre-alimei-auth.sg.aliyun.com, DNS:pre-alimei-auth.us.aliyun.com, DNS:pre-alimei-content.aliyun.com, DNS:pre-alimei-content.sg.aliyun.com, DNS:pre-alimei-sub.aliyun.com, DNS:pre-alimei-sub-sg.aliyuncs.com, DNS:pre-alimei-sub-us.aliyun.com, DNS:pre-mailsso.aliyun.com, DNS:pre-mailsso-personal.aliyun.com, DNS:pre-mailsso.sg.aliyun.com, DNS:pre-mailsso.us.aliyun.com, DNS:qiye.aliyun.com, DNS:smtp40.alibaba-inc.com, DNS:smtp.alibaba.com, DNS:smtp.alibaba-inc.com, DNS:smtp.aliyun.com, DNS:smtp.dm.aliyun.com, DNS:smtpdm.aliyun.com, DNS:smtpdm-ap-southeast-1.aliyun.com, DNS:smtpdm-ap-southeast-2.aliyun.com, DNS:smtphk.qiye.aliyun.com, DNS:smtp-inc.alibaba-inc.com, DNS:smtp-inc.aliyun.com, DNS:smtp-inner.alibaba-inc.com, DNS:smtp.mxhichina.com, DNS:smtp.ocm.aliyun.com, DNS:smtp.qiye.aliyun.com, DNS:smtp.sg.aliyun.com, DNS:smtpus.alibaba-inc.com, DNS:static.mxhichina.com, DNS:usimap.mail.alibaba.com, DNS:usimap.mxhichina.com, DNS:usmail.mxhichina.com, DNS:usmailsso.mxhichina.com, DNS:uspop3.mail.alibaba.com, DNS:uspop3.mxhichina.com, DNS:ussmtp.mail.alibaba.com, DNS:ussmtp.mxhichina.com, DNS:webmail.alibaba-inc.com, DNS:work.aliyun.com, DNS:smtpdm-ap-southeast-1.aliyuncs.com, DNS:popv6.qiye.aliyun.com, DNS:imapv6.qiye.aliyun.com, DNS:smtpv6.qiye.aliyun.com, DNS:mx1.lazada.sg, DNS:mx2.lazada.sg, DNS:ex.qiye.aliyun.com, DNS:smtpdm-us-east-1.aliyuncs.com, DNS:pre-mail.dingtalk.com, DNS:pre-alimei-preview-personal.aliyuncs.com, DNS:alimei-preview-personal.aliyuncs.com, DNS:alimail-cn.aliyuncs.com, DNS:alimail-personal.aliyuncs.com, DNS:alimail-beta.aliyuncs.com, DNS:alimail-sg.aliyuncs.com, DNS:alimail-us.aliyuncs.com, DNS:pre-alimail-cn.aliyuncs.com, DNS:pre-alimail-personal.aliyuncs.com, DNS:pre-alimail-beta.aliyuncs.com, DNS:pre-alimail-sg.aliyuncs.com, DNS:pre-alimail-us.aliyuncs.com, DNS:dm-cn.aliyuncs.com, DNS:dm-sg.aliyuncs.com, DNS:ex.sg.aliyun.com, DNS:ldap.qiye.aliyun.com, DNS:smtp.em.dingtalk.com, DNS:pop.em.dingtalk.com, DNS:imap.em.dingtalk.com, DNS:mx1.em.dingtalk.com, DNS:mx2.em.dingtalk.com, DNS:mx3.em.dingtalk.com, DNS:smtpdm-eu-central-1.aliyuncs.com, DNS:dm-us.aliyuncs.com, DNS:dm-de.aliyuncs.com, DNS:mailbee.dingtalk.com, DNS:mailbee.aliyun.com, DNS:pre-mailbee.dingtalk.com, DNS:alimail-de.aliyuncs.com, DNS:alimail-hk.aliyuncs.com
            X509v3 Extended Key Usage: 
                TLS Web Server Authentication, TLS Web Client Authentication
            X509v3 Authority Key Identifier: 
                DA:D3:A8:08:48:0C:34:37:58:EE:E5:A7:75:2E:59:FC:D6:DC:3C:38
            X509v3 Subject Key Identifier: 
                48:17:A3:32:79:62:0E:C1:C4:91:0A:E8:5E:87:F0:76:A4:9D:8F:79
            CT Precertificate SCTs: 
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : AF:18:1A:28:D6:8C:A3:E0:A9:8A:4C:9C:67:AB:09:F8:
                                BB:BC:22:BA:AE:BC:B1:38:A3:A1:9D:D3:F9:B6:03:0D
                    Timestamp : Dec  3 03:50:05.409 2024 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:45:02:21:00:D8:1C:EA:B3:87:53:37:18:0D:33:1D:
                                D1:4D:C9:F7:BA:D7:5D:14:70:34:B2:69:FA:82:FF:03:
                                58:6E:61:4D:FF:02:20:16:DE:E9:47:C6:FF:4D:3D:15:
                                6B:B8:F8:46:62:D9:21:91:04:87:C7:9E:FB:20:C9:A1:
                                58:91:D5:3E:F6:F4:0B
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : 1A:04:FF:49:D0:54:1D:40:AF:F6:A0:C3:BF:F1:D8:C4:
                                67:2F:4E:EC:EE:23:40:68:98:6B:17:40:2E:DC:89:7D
                    Timestamp : Dec  3 03:50:05.612 2024 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:44:02:20:60:57:E3:E9:FE:1F:C5:64:8E:11:94:89:
                                1B:D6:90:FC:D4:A1:A5:16:60:77:E7:E9:36:9F:0C:8B:
                                07:70:76:51:02:20:19:28:88:98:0F:4C:4A:BA:DD:9D:
                                37:BB:97:3E:44:7B:C3:79:32:CC:2D:FE:16:CB:59:8C:
                                C5:8C:D8:B5:AC:24
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : 12:F1:4E:34:BD:53:72:4C:84:06:19:C3:8F:3F:7A:13:
                                F8:E7:B5:62:87:88:9C:6D:30:05:84:EB:E5:86:26:3A
                    Timestamp : Dec  3 03:50:05.682 2024 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:45:02:20:78:DF:03:71:94:66:70:85:88:5F:AA:9C:
                                0C:37:E5:6E:70:76:81:EE:9D:E5:89:59:2A:EF:25:D6:
                                27:29:AC:A1:02:21:00:C2:24:97:05:14:7D:96:48:35:
                                82:F9:E9:13:4A:A0:E1:88:47:07:E4:6C:AA:05:DC:D9:
                                75:05:6F:D7:BF:28:61
    Signature Algorithm: sha256WithRSAEncryption
    Signature Value:
        85:67:1e:5c:ee:7c:3b:45:6a:93:7f:53:6c:ff:8f:72:35:d8:
        39:64:b4:7e:fb:d6:f4:25:2e:52:b0:a9:99:68:7e:e5:27:c1:
        f5:8c:60:1e:be:0a:c3:ec:bb:4b:70:2f:82:0a:2b:eb:81:a9:
        bf:4f:22:94:34:f0:d2:1d:49:33:2e:38:be:3a:7d:8f:6c:9f:
        97:14:09:ac:f6:d2:bd:20:be:1e:8c:69:5f:25:23:b8:90:1e:
        ce:ea:0b:38:6e:15:c1:85:b9:b3:1c:ae:5a:5a:41:2b:e2:7b:
        65:87:29:c0:45:3b:20:76:9c:0b:4d:0d:d2:90:61:23:e5:4e:
        39:f9:f2:27:f6:3f:c6:af:8c:52:75:0d:36:61:21:e5:c4:be:
        24:4b:1d:0d:d2:ec:a1:30:30:a9:5e:a9:e6:2c:89:eb:f8:88:
        dc:6a:d1:31:08:36:a8:48:01:64:cb:74:84:48:90:c7:ef:ba:
        e9:a3:73:da:65:4f:ab:37:0f:d6:ed:1a:d0:e2:2e:86:90:50:
        e7:88:87:09:c8:a4:6e:d5:3e:aa:56:20:af:07:eb:e5:c2:8a:
        02:06:bf:0e:74:2a:62:ab:f6:2a:db:49:cc:13:a9:5b:8b:e9:
        22:b4:18:45:79:cf:54:70:52:6b:7d:76:d9:8f:8a:fa:39:e2:
        20:f1:39:7e