Thank you all for your feedback on this issue. The network on this KVM is configured statically in the kickstart installation file.
I applied Peter's solution and it works perfectly. There is a straight-forward workaround to this issue. * set "inet_interfaces = all" in main.cf (the default) * only open firewall ports for interfaces that Postfix should receive email from Postfix likely does not perform the same initialization checks with this configuration and the issue does not exist as a result. I will likely use this workaround as I do not need to watch for a future packaging update in CentOS 8 that might conflict with Peter's solution. Thank you again!! Greg www.RayStedman.org
