Established a TCP connection with 106.11.232.179:25. 
But, I was not able to retrieve a respone  or speak SMTP with the daemon. 

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            36:a9:97:f3:16:b7:69:12:28:3f:9d:b9
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: C = BE, O = GlobalSign nv-sa, CN = GlobalSign GCC R3 OV TLS CA 2024
        Validity
            Not Before: Jul 30 07:21:02 2025 GMT
            Not After : Aug 31 07:21:01 2026 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, DNS:sendify.dingstore.cn, DNS:sendify.dingstore.com, DNS:dingstore.cn, DNS:dingstore.com, DNS:www.dingstore.cn, DNS:www.dingstore.com, DNS:smtpdm-eu-central-1.aliyun.com, DNS:mx1.sendify.dingstore.cn, DNS:mx2.sendify.dingstore.cn, DNS:mx3.sendify.dingstore.cn, DNS:acalendar.qiye.aliyun.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    : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65:
                                01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8
                    Timestamp : Jul 30 07:21:15.848 2025 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:44:02:20:6F:E3:4D:E8:1B:CD:63:4F:55:14:29:FC:
                                63:58:0B:38:62:98:A7:3E:B1:57:DE:45:91:6E:CB:E7:
                                F1:5C:EB:56:02:20:10:BA:B7:63:04:FA:94:24:E1:F9:
                                10:3C:FD:EC:53:68:48:73:17:4A:89:37:90:62:B2:EE:
                                2C:F6:7B:80:57:57
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : CB:38:F7:15:89:7C:84:A1:44:5F:5B:C1:DD:FB:C9:6E:
                                F2:9A:59:CD:47:0A:69:05:85:B0:CB:14:C3:14:58:E7
                    Timestamp : Jul 30 07:21:15.579 2025 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:45:02:21:00:E2:08:C9:F9:1F:9A:BA:9D:7E:A9:8C:
                                C3:F1:38:AF:20:85:5C:26:2E:63:64:BB:14:95:03:17:
                                E4:94:41:8F:10:02:20:55:C2:EF:1A:10:54:BD:6F:0E:
                                75:CB:8E:48:4C:F0:0E:1F:53:71:87:58:4F:22:AB:E7:
                                39:77:84:15:D4:2B:40
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB:
                                C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD
                    Timestamp : Jul 30 07:21:15.815 2025 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:45:02:20:09:85:08:C1:66:04:F7:95:85:E1:B3:41:
                                82:90:78:4C:CA:1A:23:B3:9E:78:86:BA:58:45:D1:C9:
                                04:C3:8B:7B:02:21:00:91:E7:25:96:6E:91:0C:52:41:
                                A2:8D:49:A7:BC:3B:23:2E:25:23:5A:85:3F:37:4F:03:
                                F6:B1:B5:14:AD:C5:7D
    Signature Algorithm: sha256WithRSAEncryption
    Signature Value:
        28:33:d3:00:21:55:f4:43:8b:39:81:f5:1a:0e:f1:e7:32:8f:
        09:9a:d6:5a:5c:40:34:a7:80:46:02:b9:63:d3:fb:95:e1:15:
        c5:3f:56:d7:08:8f:88:cc:68:7e:8b:e6:12:cc:01:2b:77:cf:
        b3:c2:c4:a4:db:73:61:25:5b:65:6f:74:89:f2:70:93:29:20:
        a6:e6:4b:c0:fc:62:92:83:0f:d7:92:10:1a:0d:2d:46:b2:7c:
        ab:b8:ee:ee:63:cc:d6:4b:f3:4f:bb:9c:1a:7d:23:00:20:ed:
        7a:43:4e:78:18:ee:8b:9b:c4:4a:73:cc:ee:62:fd:7a:f0:8e:
        17:fa:2d:1f:4c:c9:ad:c2:ad:23:fe:63:15:99:6e:4f:a7:92:
        9b:2a:a3:a7:a1:3e:de:ca:02:22:26:00:2a:32:ca:4f:d6:ab:
        cf:3a:d7:7b:b5:3e:a6:c6:a2:d8:fe:5b:13:26:c9:0c:2f:b3:
        41:25:b8:c9:83:13:19:c2:fe:10:13:b4:ee:a9:8a:01:8b:06:
        c5:3a:f0:5c:12:c0:19:e6:3c:c1:cb:3b:1c:4f:50:f9:cc:c8:
        a9:69:87:3c:16:73:50:72:77:e7:5e:29:6a:90:40:6a:57:4d:
        ce:e0:1a:32:2f:a0:80:e9:f6:00:ae:3f:2d:25:40:da:1f:50:
        e4:8d:d0:f5