4.0
Message Delivery to and from the Internet
Section 4.1, TCP/IP Link: Outbound Transfer to the Internet Successful
Section 4.2, TCP/IP Link: Outbound Transfer to the Internet Delayed or Unsuccessful
Section 4.3, Mapped/UNC Link: Outbound Transfer to the Internet Successful
Section 4.4, Mapped/UNC Link: Outbound Transfer to the Internet Delayed or Unsuccessful
Section 4.5, TCP/IP Link: Inbound Transfer from the Internet Successful
Section 4.6, Mapped/UNC Link: Inbound Transfer from the Internet Successful