I think that she will have to use her dialup connection for Tiscali.
found this infor for you click here
This is done using a service called SMTP. Your email application needs to have an SMTP server address.
Note that to stop Spam, some email services only let you send email via their STMP server if you are connected to the Internet using that Internet provider. For example, Tiscali may not let you send emails from your Tiscali account if you are connected using BT Broadband"