Roundcube – add client’s IP-address and host name to outgoing email headers
By default, the logged in client’s IP-address and hostname are not present in the outgoing email headers which makes it hard to trace the origin in case of abuse.
To make roundcube add this to the email headers of outgoing email, put this in the roundcube configuration file:
// put user's ip and host name in mail headers to enable trace
$config['http_received_header'] = true;