How to deal with unverified users in Drupal? What do you do with unverified emails in Drupal? I see some have been unverified for several months.

Is it possible to resend the email or to auto delete them?
you should try the Logingtoboggon module. it has this feature


  
  Allow users to login using either their username OR their e-mail address.
  Allow users to login immediately.
  Provide a login form on Access Denied pages for non-logged-in (anonymous) users.
  The module provides two login block options: One uses JavaScript to display the form within the block immediately upon clicking "log
  in". The other brings the user to a separate page, but returns the
  user to their original page upon login.
  Customize the registration form with two e-mail fields to ensure accuracy.
  Optionally redirect the user to a specific page when using the 'immediate login' feature.
  Optionally redirect the user to a specific page upon validation of their e-mail address.
  Optionally display a user message indicating a successful login.
  Optionally combine both the login and registration form on one page.
  Optionally have unvalidated users purged from the system at a pre-defined interval (please read the CAVEATS section of INSTALL.txt
  for important information on configuring this feature!).
  Integrates with Rules module to do various tasks when a user validates via    email validation process (see
  http://drupal.org/node/880904 for an example)
  


I have put the feature you are looking for in bold.