Enabling SSL on Eudora

Select menu Tools then options.

For SSL when receiving mail, choose checking mail.
The Checking Mail options window appears.

SSL on Eudora

In the Secure Sockets when Receiving field, click the down arrow to display the drop-down menu.
Following is a description of each option on the SSL drop-down menu:

Never - Do not use SSL for mail transfer security, even if SSL is available on the server.

If Available, STARTTLS (default) - Use SSL for mail transfer security by having Eudora automatically invoke the STARTTLS command method to start SSL, that is, if the server supports STARTTLS. If your server doesn't support STARTTLS, mail transfers will occur successfully, but they will not be secured with SSL.

Required, Alternate Port - Use SSL for mail transfer security by having Eudora automatically use the older style alternate port method for starting SSL. If your server does not support SSL on the appropriate ports, mail transfers will fail.

Required, STARTTLS [Recommended] - Use SSL for mail transfer security by having Eudora automatically invoke the STARTTLS command method to start SSL. If your server does not support STARTTLS, mail transfers will fail.

Choose the Advanced Network category. Change "Network buffer size" to 8192.

Click OK to save the changes.

To display the most current information for an SSL connection between a server and Eudora since the last time you started Eudora, click Last SSL Info . The Eudora SSL Connection Information Manager window appears with SSL and certificate information.
If you get a SSL Negotiation Failed: Certificate Error: Cert Chain not trusted. error, see Eudora Problems and Solutions for details.

MAC Eudora

Note: To use SSL in Eudora, you must have Apple's Keychain installed on your computer. SSL is supported for MacOS Classic and MacOS 10.2 and later, but not OS 10.0 or 10.1. To access SSL settings:

Select Special | Settings | SSL.

SSL on Eudora

In the SSL for POP field, choose an SSL setting (see below) for receiving messages from a server if you are using the POP protocol.

SSL for SMTP is not available at this time.

In the SSL for IMAP field, choose an SSL setting (see below) for receiving messages from a server if you are using the IMAP protocol.

Choose one of the following from the popup menu:

None (default) - Do not use SSL for mail transfer security, even if SSL is available on the server.

Required (TLS) [Recommended] - Use SSL for mail transfer security by having Eudora automatically invoke the STARTTLS command method to start SSL. If your server does not support STARTTLS, mail transfers will fail.

Optional (TLS) - Use SSL for mail transfer security by having Eudora automatically invoke the TLS command method to start SSL, that is, if the server supports TLS. If your server doesn't support TLS, mail transfers will occur successfully, but they will not be secured with SSL.

Required (Alternate Port) - Use SSL for mail transfer security by having Eudora automatically use the older style alternate port method for starting SSL. If your server does not support SSL on the appropriate ports, mail transfers will fail.