POPSmtp allows you to transfer e-mails from your existing POP3 mailboxes to any SMTP server (such as Micosoft Exchange) in any given interval. POPSmtp runs in the background as a Windows Service - you do not need to worry about computer restarts. The demo version of POPSmtp allows you to transfer e-mails from one POP3 account, while the licensed version can transfer e-mails from an unlimited amout of POP3 accounts.