Advanced Maillist Verify   
http://www.mailutilities.com

Advanced Maillist Verify (AMV) is a program that verifies the validity of e-mail addresses in databases, address books and mailing lists. Now that's not just a standalone program - it can be easily integrated into existing systems using open COM/ActiveX and CGI/ISAPI interfaces. The package includes detailed documentation and examples (for most major programming languages) for integrating Advanced Maillist Verify into Internet/Intranet servers based on Active Server Pages technology from Microsoft and ColdFusion from Allaire. The program works on the same algorithm as ISP mail systems do. Mail servers addresses for specified address are extracted from DNS. The program tries to connect with found SMTP-servers and simulates the sending of message. It does not come to the message sending - AMV disconnect as soon as mail server informs does this address exist or not. AMV can find about 90% of dead addresses - some mail systems receive all messages and only then see their addresses and if the address is dead send the message back with remark about it. Works with Socks5 proxy (to use in LAN). The program supports all popular file formats - from simple mailing lists to Eudora, The Bat! and Windows address books, and not just shows non-existing addresses, but also able to remove them from source lists and create "exclusion" lists. ODBC SQL support is there, allowing to work with DBMS like MS SQL, Oracle, MySQL, MS Access and others, and even with Microsoft Excel. Advanced Maillist Verify can save time and money for businesses who send newsletters to their clients, nonprofits who send bulletins to their members, or any person or business that needs to maintain a clean e-mail contact list.

Actual Contacts for Outlook   
http://www.mapilab.com

Actual Contacts for Outlook(ACO) is a Microsoft Outlook add-in for updating your address book and monitoring validity of e-mail addresses in the contacts. Select the contacts you wish to update and ACO will send them a message containing a form to fill. The respondents will be able to update their data in your address book by filling out the form. This program is also able to check your address-book. It takes it a few minutes to inform you about the contacts that contain invalid email addresses. The add-in also supports validation of the recipient list in Mail Merge Mode in Microsoft Outlook and Microsoft Word (a mail merge function is prerequisite for version 2002 or later ones). In order to check an address, ACO imitates sending a message to this address. When the server confirms or doesn't confirm the existence of this address, the program cancels message sending and finishes the session correctly. So, address verification is technically correct and cannot be noticed by the address owner. Now Actual Contacts has the full functionality of Contacts Verifier which was earlier offered as a separate solution. Tasks that can be solved with ACO: 1) Updating your contacts. This is the main purpose of the program. To do it, just specify parameters and send the update request. 2) Collecting additional information. It often happens that new contacts are acquired during after exhibitions and seminars where you may only have managed to note their names and e-mail addresses. ACO will help you to collect the missing information quite easily! 3) Simple surveys. Customizable templates (with different fields included in the form) make the program a simple to use information tool. 4) Updating your contact information in your respondents' address books. You can add information about yourself in the VCard format to your update request. Almost all e-mail clients and mobile devices can import this information into their contact lists.