Contacts Verifier is an add-in for Microsoft Outlook 2000/XP, designed to verify the validity of e-mail addresses of selected contacts. It can check your entire address-book in just a few minutes and notify you of email addresses that are no longer valid. If invalid entries are found, you`ll have the choice to delete the contact or mark it. Contacts Verifier supports multi-threaded connections for fast verification results and supports Socks 5 proxy settings.