So, storing the password unencrypted is preferable if combined with the option to resend the current password to the user. We could make this an optional switch (resend_password vs. create_new_password).
As always there is a catch though: Users are a lazy bunch. They usually use the same password for a couple of websites. Storing the password encrypted prevents the maintainers of the site to access your password and try it out on other sites. Furthermore, sending your current password over the net via email makes it possible to obtain your login for other sites for the occasional password searching filter.