We have a computer with dual nic cards (Computer B). One network is public the other private. The mail server is on the public network (Computer C). I have a third computer connected to the private network (Computer A). I want to be able to send out SMTP mail from Computer A through Computer B to Computer C. Computer B can ping Computer A + C. Computer A cannot ping Computer C. Computer A: Ethernet adapter Engg Domain: Connection-specific DNS Suffix . : securedml.net IP Address. . . . . . . . . . . . : 128.10.10.50 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 128.10.10.67 Computer B: Ethernet adapter Local Area Connection: (Private Network) Connection-specific DNS Suffix . : securedml.net IP Address. . . . . . . . . . . . : 128.10.10.67 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : Ethernet adapter Local Area Connection 3: (Public Network) Connection-specific DNS Suffix . : corp.clueless.com IP Address. . . . . . . . . . . . : 150.10.21.3 Subnet Mask . . . . . . . . . . . : 255.255.240.0 Default Gateway . . . . . . . . . : 150.10.16.1 Any help would be appreciated.1 person needs an answerI do too