In the NAT table, we have a static and dynamic NAT.

The NAT address table is as follows:

This configuration is a public IP pointing to a private IP (Groupwise
Mail Server).

This allows us to Telnet to the Mail Server on Port 25 with no DELAY.
With the following configuration (recommended for security reasons)

This configuration is with the Mail Relay station taking emails and
forwarding to the Groupwise server.

When using this config, the Telnet session on port 25 gets a 80 second
DELAY before the 220 Ready responce.

As soon as Groupwise is no longer NATing with an external IP, the
DELAY occurs.

* Using an external DNS server in inetcfg on the Groupwise server.