Enable SSL (Beginner Question)

[clifton11221]

I'm attempting to enable SSL on my RoundCube installation (v1.3..  In the install instructions I see:

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// To use SSL/TLS connection, enter hostname with prefix ssl:// or tls://

However, I don't see the line of code to add this.  Kindly post an example of what I should be looking for and how it should look when I make the edit.

[SKaero]

You prefix the default_host and smtp_server lines in the Roundcube config.inc.php

[clifton11221]

I tried:

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$config['default_host'] = 'ssl://localhost';

and

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$config['default_host'] = 'tls://localhost';

Neither worked... When I attempt to login I receive the error:

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Connection to storage server failed.

Also, I do not have an "smtp_server" line of code in my config.inc.php file.