Roundcube config TLS://localhost vs TLS://mail.example.tld

Best practice for multiple ISPconfig websites' email addresses and TLS?

Code:

$config['default_host'] = 'tls://mail.example.com';

vs.

Code:

$config['default_host'] = 'localhost';

or maybe even

Code:

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

Code:

$config['smtp_server'] = 'tls://mail.example.com';

vs.

Code:

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

Code:

$config['imap_conn_options'] = array(
  'ssl'         => array(
     'verify_peer'  => true,
     'verify_depth' => 3,
     'cafile'       => '/etc/openssl/certs/ca.crt',
   ),
 );

vs

Code:

$config['imap_conn_options'] = array(
'ssl'         => array(
     'verify_peer'       => false,
     'verfify_peer_name' => false,
  ),
);

**$config['smtp_conn_options'] identical**



and, of course...

Code:

$config['smtp_port'] = 587;

(Perfect server tutorial, Debian 10, ISPconfig(3.1), NginX(1.14), Postfix(3.4.7), Roundcube, Dovecot(2.3.4.1), PHP(7.3), Digital Ocean hosting, and lots of altering/tinkering)

 

#faith

 

nobody?