SSL-Tools

SSL check results of mail.dsei.eu

NEW You can also bulk check multiple servers.

Discover if the mail servers for mail.dsei.eu 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 Fri, 14 Mar 2025 01:42:19 +0000

We can not guarantee a secure connection to the mailservers of mail.dsei.eu!

Please contact the operator of mail.dsei.eu and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/mail.dsei.eu

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.dsei.eu
2a01:e0a:5ab:eac0:be24:11ff:fe9c:89f
Results incomplete
10 not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
11 s
mail.dsei.eu
82.66.224.111
 10
supported
mail.dsei.eu
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
3 s

Outgoing Mails

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

Certificates

First seen at:

CN=mail.dsei.eu,OU=mailcow,O=mailcow,L=Willich,ST=NRW,C=DE

Certificate chain
  • mail.dsei.eu (Certificate is self-signed.)
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
    • Unknown Authority
Subject
Country (C)
  • DE
State (ST)
  • NRW
Locality (L)
  • Willich
Organization (O)
  • mailcow
Organizational Unit (OU)
  • mailcow
Common Name (CN)
  • mail.dsei.eu
Issuer

Certificate is self-signed.

validity period
Not valid before
2025-03-07
Not valid after
2026-03-07
Fingerprints
SHA256
C1:05:B2:A5:45:5C:46:28:20:0D:72:38:56:10:B7:B8:E2:BC:21:C1:5A:3E:60:C7:6D:57:09:10:CE:AC:8A:A0
SHA1
4F:EE:21:B2:3D:7A:64:E7:04:FC:72:76:69:1E:B2:9F:DB:99:68:A8
X509v3 extensions
subjectKeyIdentifier
  • C4:80:19:8C:6B:6B:AE:16:9B:05:33:76:22:0F:8D:95:00:CB:72:23
authorityKeyIdentifier
  • keyid:C4:80:19:8C:6B:6B:AE:16:9B:05:33:76:22:0F:8D:95:00:CB:72:23