How do I use "Why Can't I Connect?"
I will attempt a connection to an SMTP Server. Enter the server name or IP address. Choose between STARTTLS or SSL/TLS. Select a port. The default port for SMTP STARTTLS is 587. The default port for SMTP SSL/TLS is 465. I expect a response from SMTP STARTTLS so I will wait for the response and close the connection on success. I do not expect a response from SMTP SSL/TLS so I will close the connection on success.
Release 1.12.0
In this release
1. Added SSL / TLS support for IMAP, POP3, SMTP, LDAP, Usenet, and Generic Client connections.
2. Added a trace showing the SSL / TLS certificate information after a connection.
3. Fixed a bug when connecting a Generic Client that expects a response.
Warning: this application links to the openssl libraries. Do not download this application if this is illegal in your country.
The SSL / TLS certificate information trace shows the valid date range and subject information if the trace detail level is set to Medium. The trace additionally shows the issuer information if the trace detail level is set to High.