On Tue, Oct 16, 2012 at 11:06 AM, Benjamin Hackl <b.hackl at focusmr.com> wrote: > Does your postfix send emails directly or do you use a smarthost for > relaying? I'm asking because you're using a 10.x.y.z network > which means you use NAT for outgoing connections when delivering mails > directly to the destination server. Bad idea. Worse if the destination > server does some sanity checks (like spf or reverse checking of your > ip/dns etc). I really don't know the answer to that question. The scenario is that they run a django based web app, and they wanted me to add a password recovery feature to it. When I did that, and it tried to send the recovery link to the user, it failed with 'SMTPServerDisconnected.' I thought, of course, there is no SMTP server running, so I set upon getting postfix running. As I said in my initial post, I've never done that before. I'm a developer, not an admin ;-)