Im using Arch Linux. Have postfix installed and works.

I can send mail to a user when i use user@localhost or user@127.0.0.1.
And i can send to user@yahoo.com.
But if i send mail to the same user @ 127.0.0.1 but using the actual LAN ip (eg, user@192.168.1.103) it does not get recieved. And i get a message from postfix saying it could not get sent.

home network consist of two computers connect to a router (linksys). It seems like the mail does not get sent if it leaves the computer to go out to the network. Even if its coming back to the same computer. But it does get sent if it uses the loopback and never leaves the computer.

Thanks for any help. Sorry about spelling, its 4:30 in the morn.