SSL check results of

NEW You can also bulk check multiple servers.

Discover if the mail servers for 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.




Incoming Mails

These servers are responsible for incoming mails to addresses.

Fetching DNS records

Outgoing Mails

We have received emails from these servers with sender addresses. Test mail delivery

Host TLS Version & Cipher (
TLSv1.3 TLS_AES_256_GCM_SHA384


Fetching Certificates