regular expression validator

[Maziar Aflatoun]

Hi,

I haven't used RE for some time now and my RE is a little rusty . I have
the following regular expression to validate emails

\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

How would I modify this to allow spaces (0+) at the end of the email? And
what does ([-.]\w+)* mean together?

Thanks
Maz.