Roundcube Managesieve

// Managesieve server host (and optional port). Default: localhost.
// Replacement variables supported in host name:
// %h - user's IMAP hostname
// %n - http hostname ($_SERVER['SERVER_NAME'])
// %d - domain (http hostname without the first part)
// For example %n = mail.domain.tld, %d = domain.tld
// If port is omitted it will be determined automatically using getservbyname()
// function, with 4190 as a fallback.
// Note: Add tls:// prefix to enable explicit STARTTLS
// or add ssl:// prefix to enable implicit SSL.
$config['managesieve_host'] = 'localhost';