How to check ssl port for mail server

To check the SSL port for a mail server, you can use the following methods:

Method 1: Using Telnet

Open a command prompt or terminal window.
Type telnet followed by the mail server's hostname or IP address and the SSL port number (usually 465 or 587). For example:
```
telnet mail.example.com 465
```
Press Enter to establish the connection.
If the connection is successful, you should see a response from the mail server indicating that it is listening on the specified port.
If you receive an error message or the connection times out, it may indicate that the mail server is not listening on that port or that there is a firewall blocking the connection.

Method 2: Using OpenSSL

Open a command prompt or terminal window.
Type openssl followed by the s_client command and the mail server's hostname or IP address and the SSL port number (usually 465 or 587). For example:
```
openssl s_client -connect mail.example.com:465
```
Press Enter to establish the connection.
If the connection is successful, you should see a response from the mail server indicating that it is listening on the specified port.
If you receive an error message or the connection times out, it may indicate that the mail server is not listening on that port or that there is a firewall blocking the connection.

Method 3: Using a Mail Client

Open a mail client such as Microsoft Outlook or Mozilla Thunderbird.
Configure the mail client to connect to the mail server using the SSL port number (usually 465 or 587).
Try to send an email or check for new mail.
If the connection is successful, you should be able to send and receive email without any issues.
If you encounter errors or the connection times out, it may indicate that the mail server is not listening on that port or that there is a firewall blocking the connection.

Common SSL Ports for Mail Servers

Port 465: This is the traditional SSL port used for SMTPS (Secure SMTP) connections.
Port 587: This is the recommended SSL port used for submission of email messages to a mail server.
Port 993: This is the SSL port used for IMAP (Internet Message Access Protocol) connections.
Port 995: This is the SSL port used for POP3 (Post Office Protocol version 3) connections.

Remember to replace mail.example.com with the actual hostname or IP address of your mail server.