Attached is a patch that will cause email verification to be done on user-supplied e-mails on:
1) The site contact form
2) The multiple user account creation form provided by the userplus module (http://drupal.org/project/userplus)

The patch must be applied after the patch to verify e-mail addresses in comments at http://drupal.org/node/458758#comment-3047218

Files: 
CommentFileSizeAuthor
email_verify_contact_userplus.patch3.01 KBpenguin25