[squid-users] Problems with site blocking

Hi !

I have a file(maillinks.txt) in it are links to websites they are forbidden:
for example:
www.freeze.com
www.mailcity.com
www.cyselmail.com
www.one.at

Now one user requested a website with name www.onenationwa.org.au.
His request was denied.

I deleted the entry www.one.at in my maillinks.txt, reconfigured squid and he
has access to the website www.onenationwa.org.au.

No my question why??? Cant squid recongnize . points in the file??
Did i something wrong in the file??
mfg

SP