IMAP Server

How do I use "Why Can't I Connect?"

I will attempt a connection to an IMAP Server. Enter the server name or IP address. Choose between STARTTLS or SSL/TLS. Select a port. The default port for IMAP STARTTLS is 143. The default port for IMAP SSL/TLS is 993. I expect a response from IMAP STARTTLS so I will wait for the response and close the connection on success. I do not expect a response from IMAP SSL/TLS so I will close the connection on success.