From the way your post reads, I assume that you're using web-based mail. Despite companies like Tiscali promoting their web-based email services, these are never as good as using a dedicated email client (such as Outlook, Outlook Express or Thunderbird). The only time that web-based services are really useful is when you want to access your mail while you're away from home. (e.g. from an internet caf�).
So switch to using a proper email client and you'll never have to bother logging in again. Most people have Outlook Express on their PCs, so all you need to do is to configure it to send and receive your mail. That's dead easy. See here:
http://www.tiscali.co.uk/help/email/oe_setting s_start.html
Chris