Thunderbird Security settings

  guesswho2 19:59 24 Oct 2006
Locked

In Thunderbird > Tools > Account Settings, Server Settings there is a box titled Security Settings.
Would someone please advise which of the various Secure Connection radio buttons I should select and why: Never, TLS, if available, TLS and SSL.
Then there is a box for; Use secure authentication - should I tick here?

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