1st Subscription Manager – is a simple and fast way to extract business emails from your regular POP3 mailbox.
When your clients subscribe or unsubscribe using an email message, you can use this utility to grab the messages they produced from any POP3 mailbox and then feed them to address book in Outlook Express or Advanced Emailer, or any other program.

• Connect to any POP3 compatible mailbox anywhere and grab messages.
• You can specify which words to look for in the subject line.
• Best of all it is FREE