SSL-Tools

SSL check results of deprostav.cz

NEW You can also bulk check multiple servers.

Discover if the mail servers for deprostav.cz 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, 12 Sep 2026 00:30:07 +0000

The mailservers of deprostav.cz can be reached through an encrypted connection.

However, we found problems that may affect the security.

Servers

Incoming Mails

These servers are responsible for incoming mails to @deprostav.cz addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.reindeer.digital
31.70.84.50
 10
supported
rcgen self signed cert
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s

Outgoing Mails

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

Certificates

First seen at:

CN=rcgen self signed cert

Certificate chain
  • rcgen self signed cert (Certificate is self-signed.)
    • remaining
    • 256 bit
    • ecdsa-with-SHA256
    • Hostname Mismatch
    • Unknown Authority
Subject
Common Name (CN)
  • rcgen self signed cert
Common Name is not included in Alternative Names
Alternative Names
  • localhost
Issuer

Certificate is self-signed.

validity period
Not valid before
1975-01-01
Not valid after
4096-01-01
Fingerprints
SHA256
23:56:83:21:52:D0:A3:1C:92:A0:37:E4:86:48:F5:A2:C4:A7:F6:DA:FB:1F:22:A4:AB:6C:90:83:97:81:BB:23
SHA1
98:25:34:F8:F2:04:17:52:28:00:54:CC:DA:88:4B:07:90:04:EF:DF