Discover if the mail servers for iol.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.
Report created Wed, 07 Feb 2024 17:30:41 +0000
These servers are responsible for incoming mails to @iol.cz addresses.
Hostname / IP address | Priority | STARTTLS | Certificates | Protocol | ||
---|---|---|---|---|---|---|
smtp-in.iol.cz
90.176.151.96
|
10 |
supported
|
smtp-in.iol.cz |
|
1 s
|
We have received emails from these servers with @iol.cz sender addresses. Test mail delivery
Host | TLS Version & Cipher | |
---|---|---|
210.150.broadband14.iol.cz (90.181.150.210) |
Insecure - not encrypted!
|
|
178.152.broadband16.iol.cz (90.183.152.178) |
Insecure - not encrypted!
|
|
50.158.broadband16.iol.cz (90.183.158.50) |
Insecure - not encrypted!
|
DNS-based Authentication of Named Entities (DANE) is a protocol to allow X.509 certificates to be bound to DNS using TLSA records and DNSSEC.
Name | Options | DNSSEC | Matches |
---|---|---|---|
_25._tcp.smtp-in.iol.cz |
|
valid
|
valid
|