SSL-Tools

SSL check results of 1und1.de

NEW You can also bulk check multiple servers.

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

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Report created Tue, 22 Jul 2025 16:57:50 +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
mxint02.1and1.com
212.227.126.207
Results incomplete
10
supported
not checked
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
not checked
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
not checked
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
mxint01.1and1.com
212.227.126.206
Results incomplete
10
supported
not checked
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

No Certificates found