SSL-Tools

SSL check results of dmdevelopment.ru

NEW You can also bulk check multiple servers.

Discover if the mail servers for dmdevelopment.ru 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 Thu, 12 Jun 2025 00:31:41 +0000

We can not guarantee a secure connection to the mailservers of dmdevelopment.ru!

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

/mailservers/dmdevelopment.ru

Servers

Incoming Mails

These servers are responsible for incoming mails to @dmdevelopment.ru addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
smtp1.dmdevelopment.ru
84.22.136.88
 1
supported
*.dmdevelopment.ru
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
14 s
smtp2.dmdevelopment.ru
62.60.187.58
 2
supported
smtp2.dmdevelopment.ru
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
5 s
mail.dmdevelopment.ru
84.22.136.88
Results incomplete
5
unsupported
not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
11 s
edge.dmdevelopment.ru
164.215.68.237
Results incomplete
6
unsupported
not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
6 s

Outgoing Mails

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

Certificates

First seen at:

CN=smtp2.dmdevelopment.ru,O=DMD,L=city,ST=Krasnoyarsk,C=RU

Certificate chain
  • smtp2.dmdevelopment.ru (Certificate is self-signed.)
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
    • Unknown Authority
Subject
Country (C)
  • RU
State (ST)
  • Krasnoyarsk
Locality (L)
  • city
Organization (O)
  • DMD
Common Name (CN)
  • smtp2.dmdevelopment.ru
Issuer

Certificate is self-signed.

validity period
Not valid before
2025-06-05
Not valid after
2035-06-03
Fingerprints
SHA256
AD:D7:E3:5C:5C:C8:9E:C4:3E:4A:63:F2:95:71:98:58:DA:A6:16:D7:D4:A0:17:1E:26:67:0C:45:6A:06:08:B2
SHA1
16:EA:8C:C3:BF:57:28:34:C7:46:4F:C9:D9:6B:D7:3A:F6:49:81:3E
X509v3 extensions
subjectKeyIdentifier
  • 9D:0A:94:2F:49:DB:1C:BA:71:43:42:33:55:08:5D:C2:2A:26:5E:5C
authorityKeyIdentifier
  • keyid:9D:0A:94:2F:49:DB:1C:BA:71:43:42:33:55:08:5D:C2:2A:26:5E:5C
First seen at:

CN=*.dmdevelopment.ru,O=dmdevelopment.ru,OU=Proxmox Mail Gateway

Certificate chain
  • *.dmdevelopment.ru (Certificate is self-signed.)
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
    • Unknown Authority
Subject
Organizational Unit (OU)
  • Proxmox Mail Gateway
Organization (O)
  • dmdevelopment.ru
Common Name (CN)
  • *.dmdevelopment.ru
Issuer

Certificate is self-signed.

validity period
Not valid before
2025-05-07
Not valid after
2035-05-05
Fingerprints
SHA256
08:73:48:F4:83:84:D1:12:80:90:82:5C:21:3C:1E:4E:D4:69:CB:25:1E:B4:85:2D:DC:0D:2A:9E:17:AE:3A:A7
SHA1
0F:E5:98:43:16:60:C5:67:64:EC:F6:E2:1B:60:79:B8:07:9E:7C:7C