Tanjaddaniel
The email program will ask you for your credentials when you add an
email account to Windows Live Mail 2011 so that it can connect to
your email provider's mail server-this includes your email address
and password. But most email providers allow you to change password
whenever you want, and typically let you do that from their website
(this could be Hotmail, Gmail, Yahoo Mail, or your school /
employer). So soon so you update the password for your email
account, Windows Live Mail will no longer be able to send or
retrieve email messages as it no longer matches the password saved
in the file.