A few people have asked where to find the POP3 service in Windows 2008 for a simple mail server. The answer: nowhere.
While SMTP is alive and well in the Features section of the Windows 2008 Server Manager, POP3 has been removed from Windows 2008 altogether.
POP3 isn’t a very “good” method to retrieving mail and I know very few organizations that still utilize it. IMAP and Exchange connectors are far more feature-rich and useful especially in today’s multiple-device world. I do run a POP3 mail server for World’s Cutest Animals because it is quick, has minimal resource usage and is perfect for a mail server that only has a few mailboxes.
Before we all scream foul and ask Microsoft to add POP3 back into Windows 2008 SPx, I suggest you check out Hannes Preishuber’s POP3 connector for Windows 2008 x86 and x64.