[Dovecot] TLS / Dovecot / POP3

I am using Thunderbird 2.x as my client, Dovecot on the server (POP3 not IMAP).

Currently I have in my conf file:

protocols = pop3s pop3 ssl_disable = no ssl_cert_file = /usr/share/ssl/certs/dovecot.pem ssl_key_file = /usr/share/ssl/private/dovecot.pem ssl_parameters_file = /var/run/dovecot/ssl-parameters.dat disable_plaintext_auth = yes login = pop3

In Thunderbird, I have the email server setup to:

• Port 110
• TLS

Here's my question:

If I change protocols = pop3s pop3 to protocols = pop3s I can no longer connect to my mail server via Thunderbird unless I setup Thunderbird to use SSL.

Am I doing something wrong?

Thanks, John