The port of the mail server (IMAP or POP3).
A valid port number (a value between 1 and 65535) is required for the connection to take place. The property must be set before a connection is established by the task
For IMAP, the default ports are 143 for a plaintext connection and 993 for an implicit SSL connection. For POP3, the default ports are 110 and 995 respectively.
This property is not available in the Sender.