220 (vsFTPd 3.0.2)
530 Login incorrect.
530 Please login with USER and PASS.
211-Features:
 EPRT
 EPSV
 MDTM
 PASV
 REST STREAM
 SIZE
 TVFS
 UTF8
211 End

nginx1.20.1

HTTP/1.1 200 OK
Server: nginx/1.20.1
Date: Thu, 17 Oct 2024 02:40:33 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 0
Last-Modified: Fri, 12 Jan 2024 13:39:44 GMT
Connection: keep-alive
ETag: "65a14120-0"
Accept-Ranges: bytes

+OK pop3/imap service.
+OK
CAPA
TOP
UIDL
RESP-CODES
PIPELINING
AUTH-RESP-CODE
USER
SASL PLAIN LOGIN
.

* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN AUTH=LOGIN] pop3/imap service.
* CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN AUTH=LOGIN
A001 OK Pre-login capabilities listed, post-login capabilities have more.
* ID ("name" "Dovecot")
A002 OK ID completed.
A003 BAD Error in IMAP command received by server.
* BYE Logging out
A004 OK Logout completed.

Exim smtpd4.97.1

220 trast.ru ESMTP Exim 4.97.1 Sat, 12 Oct 2024 14:45:03 +0300
250-trast.ru Hello 224.4.99.27 [224.4.99.27]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-PIPECONNECT
250-AUTH LOGIN PLAIN
250-CHUNKING
250-STARTTLS
250 HELP

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 1 (0x1)
        Signature Algorithm: md5WithRSAEncryption
        Issuer: C=UK, O=Exim Developers, CN=trast.ru
        Validity
            Not Before: Oct 12 11:09:22 2024 GMT
            Not After : Oct 12 13:09:22 2024 GMT
        Subject: C=UK, O=Exim Developers, CN=trast.ru
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:c4:fe:31:e9:43:52:79:de:af:69:7b:d5:64:8b:
                    de:99:b8:6e:1c:40:51:17:d1:98:a0:8b:9c:a7:4f:
                    20:1f:bd:61:8d:7e:2d:27:ce:37:83:31:97:73:11:
                    df:41:d8:3d:1a:18:84:6f:30:a6:69:75:d2:c0:23:
                    7f:80:c3:19:41:4b:86:68:8a:e8:03:89:2d:46:39:
                    41:f9:c5:c2:91:37:10:c1:04:63:fb:02:51:cf:4d:
                    07:10:62:9e:6a:24:9d:a8:64:be:4d:8d:b3:a1:8a:
                    d4:11:32:d0:c2:e4:07:8e:82:a7:bb:2b:18:59:b8:
                    29:8c:41:42:13:3c:88:af:da:15:ac:03:86:50:b2:
                    59:44:f1:62:e7:05:c2:5f:8d:28:42:14:aa:69:fb:
                    7b:66:b9:73:8b:56:f0:8c:e5:2b:10:5d:37:9c:68:
                    6b:54:70:54:7a:12:d2:c6:86:24:ce:7c:8f:ff:c1:
                    17:48:19:b6:8e:5a:81:ca:b8:01:b7:ba:76:6b:26:
                    4d:6c:1a:65:00:a1:ac:b8:2c:c1:07:b3:30:14:a3:
                    4b:72:a5:03:d6:f8:a4:90:bc:39:f9:e4:3e:5f:41:
                    17:5e:e4:8e:3f:48:27:4b:58:3a:3c:81:86:67:14:
                    d4:93:73:92:6a:36:26:99:ef:6f:35:cd:33:5d:2c:
                    ab:c3
                Exponent: 65537 (0x10001)
    Signature Algorithm: md5WithRSAEncryption
    Signature Value:
        8e:db:c1:d1:b1:42:61:34:6d:d8:c6:1f:84:a3:fb:6d:39:c6:
        2f:2e:c0:60:74:36:28:6c:87:72:92:9c:83:c2:34:4e:9f:cb:
        e1:f9:34:70:43:f3:2f:e3:8f:5c:70:bc:cf:2d:fa:c4:70:0c:
        81:58:31:12:19:11:4f:20:42:a6:4f:48:3c:43:90:33:89:01:
        64:ee:c9:63:a1:17:1f:95:91:15:b8:2d:06:c4:74:5d:e8:35:
        ed:14:19:b2:ef:70:27:10:65:63:c5:80:17:2a:e6:63:7f:0e:
        b8:9e:47:64:46:e3:2b:b4:ab:c0:e0:5b:e4:44:e2:f1:30:32:
        6d:a9:fe:2b:97:0f:1c:40:10:18:ee:b1:7f:5b:c2:73:1a:45:
        fc:e1:7f:f2:2a:08:28:97:b6:32:7a:80:58:ea:6f:74:62:d1:
        cc:f4:1f:71:3e:56:d0:fa:5e:a9:7f:69:ad:9f:77:3d:2c:0a:
        37:a8:af:61:6d:55:57:0a:2a:66:ad:a2:3f:15:b6:4c:e5:6a:
        1f:65:15:21:e8:e1:5b:42:bb:d3:00:ab:c2:95:8c:3d:02:3b:
        f5:12:d3:ec:4d:d7:fc:8f:fc:fc:27:73:95:99:1b:13:bf:5f:
        8e:40:c5:cb:24:14:7f:d2:f9:b2:3c:b7:70:f8:45:4e:8f:9c:
        80:31:9a:5c