I've been following this thread, but I'm still a little confused; You have a domain name (I think); you have a Linux system. Why do you use comcasts' SMTP server? My domain is espersunited.com. I use Cox Business Services as my ISP so that I can get a static IP address. I send all mail out through smtp.espersunited.com. That's located in the PC sitting on the floor next to me. Why can't you do that? To me it seems like the obvious choice, but I know the obvious choice is often the most difficult to see. Am I understanding the situation correctly?
On Thu, 2005-01-20 at 10:23 -0500, Nick Smith wrote: > On Thu, 2005-01-20 at 09:16 -0500, Keith P Hassen wrote: > > > > Nick Smith wrote: > > > > > yes they can get mail but not send mail, the reason for relaying through > > > comcast.net is because if they relay through their own domain it gets > > > marked as spam etc, that whole DUL thing, they only (cheapest) way to > > > get it working was to relay through comcast, my client is running > > > *cough* exchange 2000, but if i can offer a linux alternative that will > > > work, im sure i can get them to switch, i am running a > > > postfix/courier-imap setup for my domain at home on the comcast network > > > and they havnt shut me down as of yet, but i think its only a matter of > > > time, which is why i want to find out now if there is a way around this. > > > > > > > I'm still confused about the network architecture and where these > > servers actually live, but as I mentioned, the policy is to block port > > 25 connection attempts, so as long as you have control of a server > > sitting outside the comcast domain, you can direct SMTP traffic to > > another port, say, 2500. This will get through the ISP firewall. A > > simple way to do that on the server would be: > > > > iptables -t nat -A PREROUTING -p tcp --dport 2500 -j REDIRECT --to-ports 25 > > > > _k > well i guess im kinda confused on that as well, if i change the smtp > port, wouldnt the recieving smtp server need to know what port i accept > on? like if i start sending out on 2500, what else would that affect? > the recieving wouldnt be affected because thats on a different > port/protocol right? > > > > Nick Smith > ======================================================================== > Gentoo Linux: Portage 2.0.51-r3. kernel-2.6.9-gentoo-r13. 2005 i686 > Intel(R) Pentium(R) 4. gcc(GCC): 3.3.4. UPTIME 5 days, 18:43 > ======================================================================== > > > -- > [email protected] mailing list -- -- [email protected] mailing list
