openssl s_client -connect mx2XXX.netcup.net:993
CONNECTED(00000003)
depth=2 C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert Global Root G2
verify return:1
depth=1 C = US, O = DigiCert Inc, OU = www.digicert.com, CN = RapidSSL TLS RSA CA G1
verify return:1
depth=0 CN = *.netcup.net
verify return:1
---
Certificate chain
0 s:CN = *.netcup.net
i:C = US, O = DigiCert Inc, OU = www.digicert.com, CN = RapidSSL TLS RSA CA G1
1 s:C = US, O = DigiCert Inc, OU = www.digicert.com, CN = RapidSSL TLS RSA CA G1
i:C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert Global Root G2
---
Server certificate
-----BEGIN CERTIFICATE-----
MIIGLjCCBRagAwIBAgIQDBesTiCR+65WK4AIUfVJ9DANBgkqhkiG9w0BAQsFADBg
MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3
d3cuZGlnaWNlcnQuY29tMR8wHQYDVQQDExZSYXBpZFNTTCBUTFMgUlNBIENBIEcx
MB4XDTE4MTAzMDAwMDAwMFoXDTIwMTEyODEyMDAwMFowFzEVMBMGA1UEAwwMKi5u
ZXRjdXAubmV0MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzq5jGOP2
ob9fof1ileBktRuMO4crZhI6ob0VfoPNSj9Dvsz3biV2gQecXO/X7uOrzlz7Av7p
8FZOLogOPxzFMM92C4FY9kxeDolU2uN3PCArVL7wk/3+OFBGUvVS+VEzPwglAwOZ
W8OFvDzNnRtfXWSyWvLKK+SZHys69hn+/gwkYvW5yHWcCnDF7zBXCO8CyuAciiIG
cI4F6elXSsYSZOxioreL70Hn45K6ikj4SLkWhByWlURqMePGYHG5P9CKzGW5iaUK
feo4tsm6HcejtRuREug6CaS3s2m9nSnChAZQoZjQqGl6E45AIKxUg3D8rkKJ0snn
wEQlrjpk3k8nGwIDAQABo4IDKzCCAycwHwYDVR0jBBgwFoAUDNtsgkkPSmcKuBTu
esRIUojrVjgwHQYDVR0OBBYEFKVeJy0Jr4+UKGRDqGm0di+Cooj8MCMGA1UdEQQc
MBqCDCoubmV0Y3VwLm5ldIIKbmV0Y3VwLm5ldDAOBgNVHQ8BAf8EBAMCBaAwHQYD
VR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMD8GA1UdHwQ4MDYwNKAyoDCGLmh0
dHA6Ly9jZHAucmFwaWRzc2wuY29tL1JhcGlkU1NMVExTUlNBQ0FHMS5jcmwwTAYD
VR0gBEUwQzA3BglghkgBhv1sAQIwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cu
ZGlnaWNlcnQuY29tL0NQUzAIBgZngQwBAgEwdgYIKwYBBQUHAQEEajBoMCYGCCsG
AQUFBzABhhpodHRwOi8vc3RhdHVzLnJhcGlkc3NsLmNvbTA+BggrBgEFBQcwAoYy
aHR0cDovL2NhY2VydHMucmFwaWRzc2wuY29tL1JhcGlkU1NMVExTUlNBQ0FHMS5j
cnQwCQYDVR0TBAIwADCCAX0GCisGAQQB1nkCBAIEggFtBIIBaQFnAHYApLkJkLQY
WBSHuxOizGdwCjw1mAT5G9+443fNDsgN3BAAAAFmxXw18wAABAMARzBFAiEAsMbK
p1jXHb6l/qxz90uxg0wTs+Sq53fB5BFyQb0AYt4CIAdGssXVONNPwQEwPTUm2Y5p
Hz346QywWC/jD0Ovf/WZAHUAh3W/51l8+IxDmV+9827/Vo1HVjb/SrVgwbTq/16g
gw8AAAFmxXw2tgAABAMARjBEAiAJ63sUUWAs4PsUBHzNrUrXNXIUqzB3uMH/SIgI
GBjekQIgWn83HyA1rHJZa0NDBG/gB7kvQSsz3YSXCIorQGTfdCMAdgC72d+8H4px
tZOUI5eqkntHOFeVCqtS6BqQlmQ2jh7RhQAAAWbFfDbVAAAEAwBHMEUCIQCexhed
gynmu4yyjx9shHbFEVgdHSEW0AMNNwmWAHfziAIgMApR6KCP8wCGithWG3qbqRGL
S3Qn3y1XHOO+8BMWW8wwDQYJKoZIhvcNAQELBQADggEBAJ+EsQBg9PZV8zZiCJfh
3AgWc3g1g4RKT/URhko+qC8dEiWGqoyyOtVyMjQUUDuj+8T7YoZte08BeR8fJTyt
pK/HA8ciEGgK3Ib2rgerUR++uM+303tKH/6pjTq4k9mOqQUrLgoZB0GyhSM0hwdu
99yHxITGrxEV7GKtFiCRWO5rxNOO7HNt0sjche016THgb0lumVw6CneQ7uggw4Ei
x1Uxw89Mtx0KkgdKdBQUTTlyxOpQ2mMV4O2j10UEyfOTSg4bt+29He5qIDr5NZZf
r0v51E5nH7CuCoLWCLsmo7NDnN2cykOLsyHhECmFs0hm1kBk5WqTnGUd1vpBRZjS
bcs=
-----END CERTIFICATE-----
subject=CN = *.netcup.net
issuer=C = US, O = DigiCert Inc, OU = www.digicert.com, CN = RapidSSL TLS RSA CA G1
---
No client certificate CA names sent
Peer signing digest: SHA512
Peer signature type: RSA
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 3441 bytes and written 402 bytes
Verification: OK
---
New, TLSv1.2, Cipher is ECDHE-RSA-AES256-GCM-SHA384
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : ECDHE-RSA-AES256-GCM-SHA384
Session-ID: 97126C25C77653FA0C7BB025E888FCBB293B8BC7B305BE5E9CCE93B8C1193ED1
Session-ID-ctx:
Master-Key: C17A2DF671B73A9EDB54D1B0F535BC5B0825B68A269042C9421C827FFA6CAA84C4DE271432BD6C31FAA45C7EA0803FE6
PSK identity: None
PSK identity hint: None
SRP username: None
TLS session ticket lifetime hint: 7200 (seconds)
TLS session ticket:
0000 - d7 be 68 7b 13 a3 78 f5-c6 44 85 a1 55 40 fb ac ..h{..x..D..U@..
0010 - 84 ee e3 76 dd 9f 6c 92-77 bd 12 8f cf 04 50 94 ...v..l.w.....P.
0020 - 7f 7d 25 85 ca 42 cf cf-00 15 82 a3 38 57 bf 40 .}%..B......8W.@
0030 - c0 ee b8 91 e9 08 1b 6f-71 a0 f0 7b d6 df 93 06 .......oq..{....
0040 - d5 8c 74 c3 e8 c3 4a f9-c8 7a 1d bb 86 c5 6f 54 ..t...J..z....oT
0050 - 59 37 87 cd a8 2b 35 22-cd bd 6a bb bc fd 00 84 Y7...+5"..j.....
0060 - a6 56 0a 62 d1 71 34 96-55 39 a8 79 5b b9 82 60 .V.b.q4.U9.y[..`
0070 - f6 5d a3 ed ff 6e 96 bd-7b 2b 70 22 89 c9 7a 0a .]...n..{+p"..z.
0080 - 4f 57 e2 6b 85 df 76 41-63 cc 1e d2 82 91 31 b5 OW.k..vAc.....1.
0090 - b9 2e 4c a0 63 cd 7e 8f-d3 7f a1 4e 97 3b bb 0e ..L.c.~....N.;..
00a0 - 46 09 78 f0 22 dc 98 8e-7b 21 69 01 d1 1f 45 69 F.x."...{!i...Ei
Start Time: 1596548717
Timeout : 7200 (sec)
Verify return code: 0 (ok)
Extended master secret: yes
---
* OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ AUTH=PLAIN AUTH=LOGIN AUTH=DIGEST-MD5 AUTH=CRAM-MD5] Dovecot ready.
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