I have a dedicated server, and the way it was set up by the provider, they gave eth0 an IP address, which they say could change from time to time. I have 8 IPs that I can use, and they're mapped as lo:1, lo:2, lo:3, etc. I'm only going to use 1 IP address (lo:2), so I've disabled the others.
I'm going to run a mail server (which I've already set up, QMail for those interested), but when I send messages, in the header of the email it says it's from unknown HELO at eth0's IP address. I would like to use the IP of lo:2, but am not sure if this can be done. I know the receiving mail server is detecting the IP it's being sent from, but is there a way to make it send from the IP at lo:2? I tried using iptables to forward the address:25, but it didn't change. I may have not written the rule right, but I'm starting to think I'm just SOL.
Any suggestions?
I'm going to run a mail server (which I've already set up, QMail for those interested), but when I send messages, in the header of the email it says it's from unknown HELO at eth0's IP address. I would like to use the IP of lo:2, but am not sure if this can be done. I know the receiving mail server is detecting the IP it's being sent from, but is there a way to make it send from the IP at lo:2? I tried using iptables to forward the address:25, but it didn't change. I may have not written the rule right, but I'm starting to think I'm just SOL.
Any suggestions?
