SSL-Tools

SSL check results of plus.pl

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Discover if the mail servers for plus.pl can be reached through a secure connection.

To establish a secure connection a mail server has to offer STARTTLS (SSL), a trustworthy SSL certificate, support for the Diffie-Hellman-Algorithm to guarantee Perfect Forward Secrecy and must not be vulnerable against the Heartbleed attack. Futhermore we recommend using end-to-end encryption with GnuPG.

Summary

JSON Refresh

Report created Wed, 27 May 2020 00:35:49 +0000

The mailservers of plus.pl can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @plus.pl addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
plusmx4.polkomtel.com.pl
212.2.96.54
 10
supported
plusmx4.polkomtel.com.pl
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s
plusmx3.polkomtel.com.pl
212.2.96.53
 10
supported
plusmx3.polkomtel.com.pl
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s

Outgoing Mails

We have received emails from these servers with @plus.pl sender addresses. Test mail delivery

Host TLS Version & Cipher
apn-87-251-228-114.static.gprs.plus.pl (87.251.228.114)
Insecure - not encrypted!

Certificates

First seen at:

CN=plusmx3.polkomtel.com.pl

Certificate chain
Subject
Common Name (CN)
  • plusmx3.polkomtel.com.pl
Alternative Names
  • plusmx3.polkomtel.com.pl
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-03-27
Not valid after
2020-06-25
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
57:20:1B:97:43:0A:A4:0F:80:BF:14:5E:24:B9:F7:5A:9D:54:E2:75:50:41:9C:AE:C6:23:69:91:36:23:BB:65
SHA1
D2:DE:33:94:AF:F5:77:90:A5:61:49:34:4C:C4:4F:B1:CE:3D:C5:3E
X509v3 extensions
subjectKeyIdentifier
  • 83:3D:15:32:8D:FE:E3:DE:97:B9:C9:A7:D3:28:A6:24:1B:56:10:0D
authorityKeyIdentifier
  • keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
authorityInfoAccess
  • OCSP - URI:http://ocsp.int-x3.letsencrypt.org
  • CA Issuers - URI:http://cert.int-x3.letsencrypt.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • Policy: 1.3.6.1.4.1.44947.1.1.1
  • CPS: http://cps.letsencrypt.org
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : E7:12:F2:B0:37:7E:1A:62:FB:8E:C9:0C:61:84:F1:EA:
  • 7B:37:CB:56:1D:11:26:5B:F3:E0:F3:4B:F2:41:54:6E
  • Timestamp : Mar 27 23:39:05.011 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:5D:CA:F7:75:41:52:05:E9:52:83:FE:47:
  • 05:33:0C:65:4E:9A:11:05:38:52:FB:B0:FE:79:C6:CF:
  • 57:AF:A9:63:02:20:4E:13:9F:52:3E:5F:FD:CD:9B:64:
  • 8D:6F:2F:D4:4E:FB:99:10:61:0D:58:FB:92:BE:3D:CC:
  • 90:20:B3:0A:95:3E
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 07:B7:5C:1B:E5:7D:68:FF:F1:B0:C6:1D:23:15:C7:BA:
  • E6:57:7C:57:94:B7:6A:EE:BC:61:3A:1A:69:D3:A2:1C
  • Timestamp : Mar 27 23:39:05.056 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:5B:BE:AC:75:B2:73:A3:39:15:62:1F:EC:
  • EE:CC:32:F1:2E:85:B4:76:47:88:C7:2A:91:E8:70:3F:
  • E9:97:BA:A5:02:21:00:FF:4A:84:05:BB:0C:E1:89:90:
  • F3:F3:A6:D2:F1:E6:DE:60:B8:D3:8F:A7:FE:96:BA:F8:
  • 1F:6C:B6:64:D1:A6:92
First seen at:

CN=plusmx4.polkomtel.com.pl

Certificate chain
Subject
Common Name (CN)
  • plusmx4.polkomtel.com.pl
Alternative Names
  • plusmx4.polkomtel.com.pl
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-03-27
Not valid after
2020-06-25
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
7F:A9:9F:FE:7F:5D:C3:73:0B:95:95:32:90:30:77:3C:3E:6B:71:A1:22:7A:AB:A5:E1:6B:9E:67:3E:4E:2A:76
SHA1
45:61:27:30:AC:25:89:69:58:3A:AC:82:F2:1F:B6:4C:3B:B5:78:A5
X509v3 extensions
subjectKeyIdentifier
  • BE:9A:6A:30:AA:6C:B4:B8:76:63:69:6E:7E:39:9A:16:AC:33:99:D9
authorityKeyIdentifier
  • keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
authorityInfoAccess
  • OCSP - URI:http://ocsp.int-x3.letsencrypt.org
  • CA Issuers - URI:http://cert.int-x3.letsencrypt.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • Policy: 1.3.6.1.4.1.44947.1.1.1
  • CPS: http://cps.letsencrypt.org
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : E7:12:F2:B0:37:7E:1A:62:FB:8E:C9:0C:61:84:F1:EA:
  • 7B:37:CB:56:1D:11:26:5B:F3:E0:F3:4B:F2:41:54:6E
  • Timestamp : Mar 27 23:39:35.353 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:F8:D5:3C:C0:B2:7C:4A:D0:B1:60:39:
  • C8:4C:CD:82:5E:40:31:65:D7:0D:CC:AA:13:CD:76:94:
  • 44:E5:E1:80:8A:02:21:00:B4:57:74:B5:F3:0F:73:44:
  • 45:8A:5A:CF:4C:C7:E9:86:2D:9C:F0:21:31:E4:C0:A6:
  • 4E:7B:DC:40:BF:A9:B0:88
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : B2:1E:05:CC:8B:A2:CD:8A:20:4E:87:66:F9:2B:B9:8A:
  • 25:20:67:6B:DA:FA:70:E7:B2:49:53:2D:EF:8B:90:5E
  • Timestamp : Mar 27 23:39:35.345 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:82:EA:B2:79:4B:CF:E1:AE:E9:67:F8:
  • EB:42:BB:BC:D2:0E:8B:C6:68:3B:70:09:6F:7E:92:12:
  • 16:30:A2:34:ED:02:20:2E:A9:D5:0D:F2:E9:01:F0:A8:
  • CB:6E:EF:BD:0B:38:E9:78:1E:25:68:A7:CD:88:48:CF:
  • 79:CE:79:08:1F:35:B4