POP3 stands for
Post Office Protocol Version 3. It is used for retrieving e-mails
from a server with a client that supports this protocol. Almost
all the e-mail clients available today support this protocol (Opera,
Netscape, Outlook, Outlook Express, Incredi Mail, pine, ...).
In order to have a working e-mail system, you must run servers for
the following protocols: SMTP or ESMTP, POP3, MDA. For configuring
user accounts you must work with the web configuration (either by
running the Configuration server or by copying the web interface
in your main site).
Note for advanced
users: The unique IDs associated with the messages in response
to the UIDL command, is not kept on the server. It is automatically
computed each time as a MD5 digest of some message characteristics.
This has is a good thing because there is no need to worry about
them when working manually with files and databases, but it also
has a bad side, because there exists a small possibility that two
different messages may have the same UIDL. If you are concerned
about this problem, please take a look at the sources and contact
me if you have a better idea to solve this.
any bug reports don't forget to visit the contact