I have two question:

1. Why is everyone getting an:

Received: from unknown when they get mail from me (i have a reverse record set for that ip so it should not be a problem)
mail.hostlogic.com

nslookup mail.hostlogiclive.com
Server:  ISP-SERVER
Address:  213.154.124.1

Non-authoritative answer:
Name:    mail.hostlogiclive.com
Address:  69.10.54.201

nslookup 69.10.54.201
Server:  ISP-SERVER
Address:  213.154.124.1

Name:    mail.hostlogiclive.com
Address:  69.10.54.201

2. I am sending the mail from a server and i nat it to my public ip i have 192.168.2.61. Is there a way to change the header of the mail so ppl don't see the private ip only the public ip part?

Thank you