How to check tls mail

To check TLS (Transport Layer Security) mail, you can follow these steps:

Method 1: Using OpenSSL

1. Open a terminal or command prompt.
2. Type the following command to check the TLS connection:

   openssl s_client -connect <mail_server>:<port>

   Replace <mail_server> with the hostname or IP address of your mail server, and <port> with the port number used for TLS connections (usually 465 or 587).

For example:

openssl s_client -connect mail.example.com:587

3. Press Enter to execute the command.
4. If the connection is successful, you should see a lot of output, including the TLS version, cipher suite, and certificate information.
5. Look for the "Verify return code: 0 (ok)" line, which indicates that the certificate is valid.

Method 2: Using Telnet

1. Open a terminal or command prompt.
2. Type the following command to connect to the mail server using Telnet:

   telnet <mail_server> <port>

   Replace <mail_server> with the hostname or IP address of your mail server, and <port> with the port number used for TLS connections (usually 465 or 587).

For example:

telnet mail.example.com 587

3. Press Enter to execute the command.
4. If the connection is successful, you should see a response from the mail server, including the TLS version and certificate information.
5. Look for the "220" response code, which indicates that the connection is secure.

Method 3: Using a mail client

1. Open your mail client (e.g., Microsoft Outlook, Mozilla Thunderbird, or Apple Mail).
2. Configure the client to connect to your mail server using the TLS protocol.
3. Check the client's settings to ensure that TLS is enabled and the correct port number is specified.
4. Try to send a test email to see if the TLS connection is successful.

Additional tips

• Make sure you have the correct mail server settings, including the hostname or IP address, port number, and username and password (if required).
• Check the mail server's documentation to ensure that TLS is enabled and supported.
• If you're using a proxy server, you may need to configure the proxy settings in your mail client or use a different method to check the TLS connection.

By following these methods, you should be able to check the TLS connection to your mail server and ensure that it's secure and functioning correctly.