Port number for the connection to the POP3 server.
property Port;
Port is a published TIdPort property that repesents the port number to use for the POP3 connection to the server identified in Host.
Set values in Host and Port proper to opening a connection using Connect.
The default value for Port is IdPORT_POP3, as assigned in the Create constructor.
TIdPOP3.Host
TIdPOP3.Connect
IdPORT_POP3