The POP3 provider allows for reading of messages from a POP3 mailbox.

Reading messages

Nothing special should be required for the configuration of a connection to
a POP server using the provider. The protocol to use is pop3.

  URLName url = new URLName("pop3://user:pass@host:port");
  Store store = session.getStore(url);
  Folder root = store.getDefaultFolder();
  Folder inbox = root.getFolder("INBOX");

A username and password must be supplied. The port can be omitted, it
defaults to 110.

Note that the POP3 protocol only allows for ONE mailbox. This is always
called INBOX. Much of the advanced searching functionality provided by
JavaMail, fecth profiles for instance, will not work over POP3.

The POP3Connection class

The POP3 provider internally uses an instance of POP3Connection to negotiate
the POP3 protocol with the server. This simple class models a POP3 client.
You may find it useful independently of the provider. Please note that
access to the POP3Connection is not synchronized - you must synchronize on
it yourself if you have a multithreaded application. This is taken care of
by the POP3 JavaMail provider.

Local cache

No local cache is provided. It is recommended that if you want to maintain a
local cache you use the mbox provider supplied, and transfer messages from
the POP3 mailbox to the local mbox.

Filtering

No filtering mechanism is currently supplied. It was originally hoped that
JavaMail would provide a standard architecture for this, but this
possibility now seems remote. Suggestions are welcome.

Session properties

The following session properties may be set:

mail.pop3.apop            boolean  if false, disable all attempts at
                                   APOP authentication

The provider supports TLS. For further information, refer to the Javadoc for
the gnu.mail.providers.pop3 package.