220 dirdel fast smtp ESMTP\r\n

Apache httpd

HTTP/1.1 200 OK
Date: Wed, 17 Apr 2024 14:59:07 GMT
Server: Apache
Vary: Accept-Encoding
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8

220 dirdel fast smtp ESMTP
250-mx.mailserver.com Hi Unknown [207.90.244.17]
250-PIPELINING
250-8BITMIME
250 STARTTLS

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 2 (0x2)
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: C=XY, ST=unknown, L=unknown, O=QSMTPD, OU=CA, CN=sink04/emailAddress=postmaster@sink04
        Validity
            Not Before: Oct 26 15:42:28 2021 GMT
            Not After : Oct 26 15:42:28 2023 GMT
        Subject: C=XY, ST=unknown, L=unknown, O=QSMTPD, OU=Server, CN=sink04/emailAddress=postmaster@sink04
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:d1:5b:a1:40:5d:99:d6:c3:d1:21:48:da:8b:1a:
                    50:3a:7b:be:97:12:c5:e1:a0:4a:56:dc:49:5d:5c:
                    5b:c1:75:9a:de:49:4a:08:d8:83:f2:54:9f:06:02:
                    ca:7d:80:d6:8f:5e:9b:21:c7:e9:23:71:cf:6f:ac:
                    9f:cd:82:b7:74:a8:34:1f:29:dc:a1:fd:3a:6f:7d:
                    2c:98:44:2e:08:64:91:75:69:ac:8e:fe:8d:51:8b:
                    4c:68:1f:ca:3c:09:c9:5c:72:ad:2e:98:96:ae:db:
                    20:49:8c:7e:32:24:d0:f7:54:e9:79:e5:9f:72:d7:
                    ba:ac:18:c9:a7:bd:13:c6:9d:86:67:33:fd:cf:3e:
                    da:81:56:08:2e:10:ca:03:27:d2:52:ba:81:b5:c2:
                    dd:d1:7a:87:6f:7c:12:46:10:70:43:05:74:c2:4c:
                    6c:a7:0e:fb:94:c9:ff:27:e3:6b:f6:16:61:67:ff:
                    0e:23:a8:04:74:9c:29:b0:78:62:1a:13:3c:ed:19:
                    76:ba:9b:98:cf:1e:44:83:87:43:21:9a:83:1b:60:
                    7d:e0:e7:3c:8e:0b:3d:f6:ad:53:cc:4a:52:06:84:
                    64:9c:3d:a6:43:33:c3:2d:e7:01:39:af:cd:d7:cc:
                    90:c4:5a:d7:03:7c:f1:11:4f:b5:04:66:c4:d7:fc:
                    f1:83
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Subject Alternative Name: 
                email:postmaster@sink04
            Netscape Comment: 
                tls certificate
            Netscape Cert Type: 
                SSL Server
    Signature Algorithm: sha256WithRSAEncryption
    Signature Value:
        6e:5f:31:57:0e:e6:4a:95:d7:ee:98:91:a8:37:93:d0:05:85:
        0c:6a:4a:62:58:11:35:a4:76:93:e9:c0:2f:14:c9:5e:3b:b3:
        01:08:68:dc:36:a6:3c:ce:c4:24:43:5c:f4:91:7c:f0:b9:63:
        ce:68:9e:cc:ee:da:08:f3:ac:0c:de:23:96:a9:c0:b7:86:b2:
        d3:b4:d9:c4:8c:19:e7:a7:f4:b4:bd:b3:0a:cc:4b:5f:a9:f4:
        25:1a:6e:27:1a:b4:4d:05:63:56:ce:ec:ad:6f:7a:cc:a5:2a:
        5b:d0:71:5e:23:c1:ab:e0:31:20:9c:de:0b:5b:0b:41:9f:d6:
        bb:6f:73:e4:6d:27:f0:b9:50:98:6e:00:7c:48:b2:6d:0c:b1:
        5f:85:4c:83:d2:34:59:18:05:2e:0b:7c:89:e0:c0:68:ae:13:
        9d:79:fe:b5:bd:53:c5:ef:00:f3:9b:11:e6:95:d6:66:c8:de:
        bd:cc:d3:af:12:59:a3:d1:1c:e9:bf:38:d4:29:65:10:49:d2:
        25:0c:6a:7b:9b:28:a7:cb:92:ac:4f:18:45:fc:48:c8:e5:09:
        20:fd:88:a7:02:af:f1:44:5b:a2:a3:ca:ac:9d:d1:2e:ae:bc:
        e5:6f:4d:b8:e2:eb:de:07:ef:2f:17:61:0e:33:15:62:f9:87:
        9e:fd:5d:07

nginx

HTTP/1.1 400 Bad Request
Server: nginx
Date: Thu, 11 Apr 2024 12:16:06 GMT
Content-Type: text/html
Content-Length: 650
Connection: close