SSL-Tools

SSL check results of 1und1.de

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Discover if the mail servers for 1und1.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 Wed, 07 Aug 2024 08:40:12 +0000

No connection to the mailservers of 1und1.de could be established.

Servers

Incoming Mails

These servers are responsible for incoming mails to @1und1.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mxint01.1and1.com
212.227.126.206
Results incomplete
10
supported
mxint.1and1.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
mxint01.1and1.com
212.227.17.16
Results incomplete
10
supported
mxint.1and1.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
mxint02.1and1.com
212.227.17.17
Results incomplete
10
supported
mxint.1and1.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
mxint02.1and1.com
212.227.126.207
Results incomplete
10
supported
mxint.1and1.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s

Outgoing Mails

We have received emails from these servers with @1und1.de sender addresses. Test mail delivery

Host TLS Version & Cipher
unknown (67.227.227.187)
TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384
unknown (212.162.150.119)
Insecure - not encrypted!

Certificates

First seen at:

CN=mxint.1and1.com,O=IONOS SE,L=Montabaur,ST=Rheinland-Pfalz,C=DE

Certificate chain
Subject
Country (C)
  • DE
State (ST)
  • Rheinland-Pfalz
Locality (L)
  • Montabaur
Organization (O)
  • IONOS SE
Common Name (CN)
  • mxint.1and1.com
Alternative Names
  • mxint.1and1.com
  • mxint01.1and1.com
  • mxint02.1and1.com
  • mxint03.1and1.com
  • mxint04.1and1.com
Issuer
Country (C)
  • DE
Organization (O)
  • Deutsche Telekom Security GmbH
Common Name (CN)
  • Telekom Security ServerID OV Class 2 CA
validity period
Not valid before
2024-05-14
Not valid after
2025-05-18
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Client Authentication
  • TLS Web Server Authentication
Fingerprints
SHA256
DE:07:AF:A1:04:34:24:1F:BF:45:9E:64:F2:4A:0C:EB:36:91:E1:15:A8:72:60:DA:3B:6E:1F:71:DE:41:5D:05
SHA1
4F:F8:D9:2A:8B:57:1F:C8:37:B0:EF:B2:EB:DE:FB:88:8F:96:79:6A
X509v3 extensions
authorityKeyIdentifier
  • keyid:1C:05:93:B1:7F:A8:34:30:8C:52:E0:96:40:A0:72:A3:10:5D:E0:FF
subjectKeyIdentifier
  • 6A:CE:54:8B:B8:77:39:DE:D6:DE:14:93:72:BE:CF:77:76:37:37:4C
certificatePolicies
  • Policy: 2.23.140.1.2.2
  • CPS: http://docs.serverid.telesec.de/cps/serverid.htm
crlDistributionPoints
  • Full Name:
  • URI:http://crl.serverid.telesec.de/rl/Telekom_Security_ServerID_OV_Class_2_CA.crl
authorityInfoAccess
  • OCSP - URI:http://ocsp.serverid.telesec.de/ocspr
  • CA Issuers - URI:http://crt.serverid.telesec.de/crt/Telekom_Security_ServerID_OV_Class_2_CA.crt
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : CF:11:56:EE:D5:2E:7C:AF:F3:87:5B:D9:69:2E:9B:E9:
  • 1A:71:67:4A:B0:17:EC:AC:01:D2:5B:77:CE:CC:3B:08
  • Timestamp : May 14 09:54:36.710 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:05:B9:D0:D4:AE:4C:4F:DD:92:02:1C:2C:
  • 25:DC:AA:A7:A0:16:12:75:0A:D2:F1:F7:86:B3:75:1B:
  • 74:49:85:80:02:21:00:B8:24:90:71:43:66:A0:1A:A4:
  • DF:E8:01:98:FC:CF:89:32:83:3E:E1:2D:66:9C:26:3B:
  • E6:33:EF:28:52:C7:F6
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 4E:75:A3:27:5C:9A:10:C3:38:5B:6C:D4:DF:3F:52:EB:
  • 1D:F0:E0:8E:1B:8D:69:C0:B1:FA:64:B1:62:9A:39:DF
  • Timestamp : May 14 09:54:36.755 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:47:B2:9D:2F:CA:91:07:0A:CC:61:57:E3:
  • 21:75:7E:76:36:57:BE:3F:82:E8:DA:46:FD:A4:0B:31:
  • 30:87:1E:87:02:20:1E:F6:CF:10:AB:5D:54:C8:3A:49:
  • 0A:EC:46:82:1A:E6:18:F0:30:A0:17:A5:FF:A4:06:A5:
  • A5:F7:92:57:DB:4B
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 28:E2:81:38:FD:83:21:45:E9:A9:D6:AA:75:37:6D:83:
  • 77:A8:85:12:B3:C0:7F:72:41:48:21:DC:BD:E9:8C:66
  • Timestamp : May 14 09:54:38.326 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:5C:75:64:33:2C:D7:29:E1:E9:47:22:8C:
  • 2C:D3:C7:A7:81:C8:84:26:43:FE:E0:9C:60:07:65:9F:
  • 2E:00:BC:64:02:21:00:EE:10:A7:A7:06:C0:1B:B5:66:
  • 8A:FB:9F:8B:DD:0F:59:51:31:85:0B:45:50:F7:27:81:
  • C6:62:1E:F1:73:34:8B
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : A2:E3:0A:E4:45:EF:BD:AD:9B:7E:38:ED:47:67:77:53:
  • D7:82:5B:84:94:D7:2B:5E:1B:2C:C4:B9:50:A4:47:E7
  • Timestamp : May 14 09:54:36.983 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:BD:55:84:2F:94:A4:73:A7:3F:AC:4B:
  • AF:E3:7B:5C:4F:7E:CF:3F:FB:AA:83:0A:64:8A:78:45:
  • 42:3F:50:06:C3:02:20:36:9B:B6:AC:D7:26:57:48:46:
  • E2:1E:7D:D8:73:1A:73:9A:4A:A6:6B:E6:68:15:37:BF:
  • 56:28:20:6A:7F:F5:6A