Smtp routing

bennyB · 27 Mar 2012 at 18:27

Is it possible to route smtp traffic from one computer (ubuntu - ip: 151.211.46.10) to a server (windows server 2003 - ip:151.211.5.205) which would then send it to an smtp server (ip: 151.211.5.81) with the traffic appearing to come from the IP address of the server (151.211.5.205)?

I would also like the server only to route the smtp traffic from 151.211.46.10 and no other ip addresses.

Does that all make sense? Is it possible? :confused:

BTW - I'm a bit new a networking so go easy on me if this is easy to do! I couldn't find the right thing on google...

PistolPete · 27 Mar 2012 at 18:35

Is the traffic originating from the Ubuntu box, or is the mail hitting the Ubuntu box and needs to be routed?

If it's the former, then you'd install the SMTP server on Windows 2003, filter port 25 to allow only incoming packets from the ubuntu box and set the SMTP to forward traffic to the SMTP server.

If the traffic is coming to the ubuntu box then you can do the above, but you'd need to redirect traffic in the ubuntu box somehow (not my area I'm afraid)

bennyB · 27 Mar 2012 at 19:18

It's mail originating from the ubuntu box, so I guess your suggestion of setting up an smtp server on the Windows 2003 server. I'm not quite sure how to go about doing that, would this guide be the right kind of thing?

http://www.it-notebook.org/uncategorized/article/email_server_win_2003.htm

PistolPete · 27 Mar 2012 at 19:36

That guide is more aimed at the POP3 side of things - have a look at this:

http://technet.microsoft.com/en-us/library/aa998368(v=exchg.65).aspx

bennyB · 27 Mar 2012 at 20:47

Ok thanks I'll give that a go!