This is a provider for the Internet Post Office Protocol, version 3 (POP3), as detailed in RFC 1939.

This provider supports transport layer security (TLS), as described in RFC 2595, and uses APOP authentication if the server advertises this capability.

The POP3 store provides access to a single folder named "INBOX". Folder management operations are not supported by POP3; nor are permanent flags.

This store does not provide a local cache of messages. You can implement such a cache yourself using the `mbox` or `Maildir` providers in this distribution.

POP3 does not support the `expunge` method according to the JavaMail specification. Messages deleted using `expunge` will only be removed from the folder when the `close` method is called.

This provider supports the following properties:

Name | Type | Description
--- | --- | ---
mail.pop3.host | IP address or hostname | The POP3 server to connect to.
mail.pop3.port | integer (>=1) | The port to connect to, if not the default.
mail.pop3.user | username | The default username for POP3.
mail.pop3.connectiontimeout | integer (>=1) | Socket connection timeout, in milliseconds. Default is no timeout.
mail.pop3.timeout | integer (>=1) | Socket I/O timeout, in milliseconds. Default is no timeout.
mail.pop3.tls | boolean | If set to false, TLS negotiation will not be attempted. Exceptionally, you may set this to `required` to throw an exception on connect when TLS is not available.
mail.pop3.trustmanager | String | The name of a class implementing the `javax.net.ssl.TrustManager` interface, which will be used to determine trust in TLS negotiation.
mail.pop3.auth.mechanisms | comma-delimited list of SASL mechanisms | If set, only the specified SASL mechanisms will be attempted during authentication, in the given order. If not present, the SASL mechanisms advertised by the server will be used.
mail.pop3.apop | boolean | If set to false, APOP authentication will not be attempted.
mail.pop3.rsetbeforequit | boolean | If set to true, an RSET command will be issued before QUIT. This is useful for broken servers that implicitly mark read messages as deleted.