Hi John,
Thank you for your feedback, in fact changing the following resolves my issue :
$config['default_host'] = 'localhost';
$config['default_port'] = 143;
$config['smtp_server'] = 'localhost';
$config['smtp_port'] = 25;
And yes, I'm using a certificate signed by known authority, the CN is my domain name.
However, since I need to use TLS/SASL for sending/receiving emails, I'm wondering if it's possible to use SMTP, IMAP without encryption for roundcube (anything coming from localhost), and for any in/out external emails, they will be encrypted ?
Thank you