Hi People,

I have a server which hosts a email marketing application. I just got another server and I want to use that server to send emails also
I've decided to create a tunnel IPs between them.

Server A (email server)
Server B (the other server)


On server A I did:

ip tunnel add tun1 mode ipip remote <ip_server_B> local <ip_server_A>
ifconfig tun1 10.0.0.1 netmask 255.255.255.0 pointopoint 10.0.0.2

On server B I did:
ip tunnel add tun1 mode ipip remote <ip_server_A> local <ip_server_B>
ifconfig tun1 10.0.0.2 netmask 255.255.255.0 pointopoint 10.0.0.1


Everything seems to be working OK. I can ping each other tun interface with the private IP I choose.

My question is. Now.. How can I make my application to send email via server B ? Is there any internal route I still need to do ?


Thank You!

Obviously, server A and server B can reach one another directly, since you're able to set up an IP-in-IP tunnel between them.

My question is: Why the tunnel? Why not just use server B as a mail relay?

Because I will need more IPs from other servers. Server C and Server D let's say.

BUt the email software will be sending emails via private networks (10.11.0.1) let say... and them it should hit the tunneled IP. But I don't know if it will go out to the internet...

Is there anything to do ? maybe some route on the server ?

Thanks

I still don't quite understand what you're trying to accomplish. If servers C and D can access the Internet through a NAT router and thus reach server A, they should be able to use it as a mail relay.

But anyway, if you're setting up a tunnel between servers A and B in order to have servers C and D go through server A to reach server B, you will need to do the following:

• Server A must have a route entry for the private network of servers B, C and D, pointing at the remote tunnel IP (10.0.0.1 in this case)
• Servers B and C must have a route entry for the IP of server A, pointing to server B (or they must use server B as the default gateway)

All servers (A, B, C and D) has access to the internet. However the email software is installed just on server A.

A tunnel was created using their valid IPs. Then I assign a private IP to each tun* interface.

But if server A send emails to this private IP let say (10.0.0.1) then it should go via tunnel to the server B and them go out to the internet via servers B's valid IP that was tunneled.

I need to do this with several IPs.

Did you get it ?

Thanks for your help.

Also, keep in mind that I don't know if tunneling is the right solution here. Maybe you can suggest something else.

What I need to do is have server A ( the server that has the mailing software) send emails via its IP address and use another's servers IP address to send emails as well.

Thanks

By "email software", do you mean some piece of software that sends out emails? Or do you mean a mail server?
If server B is a mail server acting as a relay for server A, then it will forward mails from server A to any and all recipients. A tunnel is not required for this.

It sounds like what you're really looking for is a mail relay, in which case you should forget about the tunnel and set up Postfix or sendmail on server B, perhaps with SMTP authentication.

If that does not suit your requirements, then you need to explain in more detail why server B needs to be involved in these mail transactions.

Hello everyone

g_paschoal have you solved this problem ?? Let me know please if this problem is solved

I have the same problem, someone have a solution ?

So, basically you want help to obfuscate the source IP while sending out bulk 'marketing emails'?

edit: oh - old thread ...

1 members found this post helpful.

not that, just we want to manage our server for mailing.
ips of sending are allocated and assigned to a server, and the server of sending (smtp server) is separeted, so we want to connecte to the remote server and use the Ips, but the sending in not from the same server because it not contains Ip.