SSL-Tools

SSL check results of dmarc.pl

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Discover if the mail servers for dmarc.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 Sat, 26 Sep 2026 00:30:11 +0000

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

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.dmarc.pl
51.83.133.152
 1
supported
mail.dmarc.pl
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s

Outgoing Mails

We have not received any emails from a @dmarc.pl address so far. Test mail delivery

Certificates

First seen at:

CN=mail.dmarc.pl

Certificate chain
  • mail.dmarc.pl
    • remaining
    • 256 bit
    • ecdsa-with-SHA384
      • YE2
        • remaining
        • 384 bit
        • ecdsa-with-SHA384
          • Root YE
            • remaining
            • 384 bit
            • ecdsa-with-SHA384
              • ISRG Root X2 (Certificate is self-signed.)
                • remaining
                • 384 bit
                • ecdsa-with-SHA384
Subject
Common Name (CN)
  • mail.dmarc.pl
Alternative Names
  • mail.dmarc.pl
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • YE2
validity period
Not valid before
2026-09-24
Not valid after
2026-12-23
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
Fingerprints
SHA256
EF:AF:64:9D:25:92:71:98:F0:E9:11:0B:B4:AE:6B:2B:F9:B0:69:6C:9C:04:71:F1:F3:A4:BD:40:F5:1F:C5:C2
SHA1
9B:16:A1:D6:5B:E0:5D:2F:00:DF:E9:7D:19:64:DF:6D:E8:9B:35:1D
X509v3 extensions
subjectKeyIdentifier
  • B2:11:E8:3D:C8:1C:7B:02:23:C1:85:E4:E9:79:BC:BE:84:47:B0:49
authorityKeyIdentifier
  • keyid:B9:59:F2:8E:CF:22:F0:86:D3:37:48:FF:76:14:18:BA:82:D8:55:87
authorityInfoAccess
  • CA Issuers - URI:http://ye2.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://ye2.c.lencr.org/118.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB:
  • 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A
  • Timestamp : Sep 24 15:26:07.117 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:DC:39:32:14:E1:1A:3D:04:2D:33:35:
  • 16:FA:BE:4F:D0:F4:63:17:6C:06:ED:68:CF:21:B4:7A:
  • 16:DF:A3:06:7D:02:21:00:B2:75:D4:C9:31:56:6B:B9:
  • 1E:DB:2D:17:2D:5C:A1:81:45:E2:26:1B:47:4E:49:52:
  • 22:F8:EA:82:9F:81:56:08
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : A2:81:00:18:73:4E:17:6E:1D:47:E0:95:40:F3:81:BA:
  • 54:66:97:CD:63:A8:43:50:71:6E:B8:09:4E:DA:F1:0D
  • Timestamp : Sep 24 15:26:07.654 2026 GMT
  • Extensions: 00:00:05:00:14:42:33:41
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:B1:C0:28:BC:09:36:F4:5A:D3:37:40:
  • B9:01:C0:85:9D:58:D7:DA:20:BA:8F:06:55:22:16:54:
  • 69:B2:68:4D:77:02:21:00:90:A8:F0:CF:46:3B:CE:CF:
  • 5D:D4:F8:5C:01:2A:DC:DA:EA:D1:2F:A1:BA:21:E7:AE:
  • F7:C6:3A:3C:30:0A:C7:B2