specified string is not in the form required for an email

Question

hi every body i have followed these example http://usingaspdotnet.blogspot.com/2011/07/sending-reset-password-link-for-one.html to reset pass word  but i have an error its
The specified string is not in the form required for an e-mail address. i put my gmail address and password in
   System.Net.NetworkCredential mailAuthenticaion = new System.Net.NetworkCredential("[email protected]", "12345678");

but still have error !! what is the slouation ?