SSL-Tools

SSL check results of mail.de

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Discover if the mail servers for mail.de 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 Fri, 29 Aug 2025 01:43:42 +0000

The mailservers of mail.de can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @mail.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mx02.mail.de
2001:868:100:600::211
 10
supported
*.mail.de
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s
mx02.mail.de
62.201.172.19
 10
supported
*.mail.de
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s
mx01.mail.de
2001:868:100:600::210
 10
supported
*.mail.de
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s
mx01.mail.de
62.201.172.18
 10
supported
*.mail.de
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s

Outgoing Mails

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

Host TLS Version & Cipher
shout02.mail.de (IPv6:2001:868:100:600::217)
TLSv1.2 AECDH-AES256-SHA
shout01.mail.de (IPv6:2001:868:100:600::216)
TLSv1.2 AECDH-AES256-SHA
shout11.mail.de (IPv6:2001:868:100:600::f153)
TLSv1.3 TLS_AES_256_GCM_SHA384
shout12.mail.de (IPv6:2001:868:100:600::f154)
TLSv1.3 TLS_AES_256_GCM_SHA384

Certificates

First seen at:

CN=*.mail.de

Certificate chain
  • *.mail.de
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
      • R10
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • *.mail.de
Alternative Names
  • *.mail.de
  • mail.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R10
validity period
Not valid before
2025-07-30
Not valid after
2025-10-28
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
BA:6E:A8:26:80:FF:9E:9C:CC:9F:62:28:19:A8:AF:27:75:A4:5C:8C:EC:9C:ED:B0:59:77:1E:CA:F1:42:92:66
SHA1
5E:C0:F7:76:34:27:86:78:EC:0C:65:C6:BC:7A:9C:79:F4:5C:04:30
X509v3 extensions
subjectKeyIdentifier
  • 25:D7:D2:34:98:8B:E6:48:BE:2B:98:5E:E0:A9:97:A8:5A:26:DE:F1
authorityKeyIdentifier
  • keyid:BB:BC:C3:47:A5:E4:BC:A9:C6:C3:A4:72:0C:10:8D:A2:35:E1:C8:E8
authorityInfoAccess
  • CA Issuers - URI:http://r10.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r10.c.lencr.org/82.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : ED:3C:4B:D6:E8:06:C2:A4:A2:00:57:DB:CB:24:E2:38:
  • 01:DF:51:2F:ED:C4:86:C5:70:0F:20:DD:B7:3E:3F:E0
  • Timestamp : Jul 30 12:22:27.465 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:C3:F0:D0:21:6D:3A:24:92:7B:A6:5F:
  • E8:25:0F:24:3B:4B:A1:99:CC:E0:2D:CD:6D:78:D7:3D:
  • D4:A4:35:A0:F5:02:20:6A:DE:FD:AD:E3:A5:79:5E:EB:
  • A1:10:21:53:82:AA:F1:7D:30:2D:06:F2:C3:8C:80:3E:
  • 05:F4:B1:7C:C0:AC:E7
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : CC:FB:0F:6A:85:71:09:65:FE:95:9B:53:CE:E9:B2:7C:
  • 22:E9:85:5C:0D:97:8D:B6:A9:7E:54:C0:FE:4C:0D:B0
  • Timestamp : Jul 30 12:22:27.475 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:55:DF:75:9C:40:BB:2D:0F:E9:21:39:C6:
  • 2F:D9:D4:E5:E7:68:FB:73:FE:C1:FB:07:01:A2:40:D0:
  • 3F:77:33:48:02:21:00:DB:9B:33:C7:46:59:9E:63:3D:
  • 8B:7D:A1:E3:22:1C:79:C3:62:B5:9B:A2:ED:A4:59:68:
  • 8C:01:E7:12:C2:12:8E

DANE

DNS-based Authentication of Named Entities (DANE) is a protocol to allow X.509 certificates to be bound to DNS using TLSA records and DNSSEC.

Name Options DNSSEC Matches
_25._tcp.mx02.mail.de
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-256 Hash
valid
valid
_25._tcp.mx02.mail.de
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-256 Hash
valid
—
_25._tcp.mx01.mail.de
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-256 Hash
valid
—
_25._tcp.mx01.mail.de
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-256 Hash
valid
valid