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I am using Redhat 9.0 and postfix 1.1.11-11. I am having trouble getting postfix to receive any mail other than mail sent internally (i.e. via the mail command to another_user@localhost). After reading many other posts on this topic, I tried telnetting to localhost 25 and it seems to work fine:
Connected to localhost.
Escape character is '^]'.
220 mail.xxxx.com ESMTP Postfix
Still haven't had any success getting this stuff to work. I've been reading a lot of posts on this site concerning postfix problems, but nothing yet has helped. Here is my main.cf file, its a little different now, but I can't tell that it has helped:
Yeah, I think you are right, and I'm not exactly sure what the iptable configuration should be. Is there any easy command line addition i can make to solve this problem? And what should I post to show you my current iptables config? Obviously, I'm not very experienced with iptables.
Dont know if this might help - I had a lot of problems with my Postfix installation for starters and I seem to remember this problem relates to mynetworks, inet_interfaces and relayhost parameters in main.cf.
First of all relayhost are commented out. Secondly I have sat inet_interfaces=all (=all domains on the server) and last but no least mynetworks=subnet -> I'm not sure about this since this might relate to some of my other problems (i.e. not beeing able to reply to a mail send from my host, from an external POP3 reader)... :-(
Well, I figured out the problem. Actually I had some help. The problem was with my hosts file in /etc/hosts. I had my hostname and domainnames the same. i.e.
192.168.1.100 myhostname.com myhostname.com
All I had to do to fix this was
192.168.1.100 myhostname.com myhostname (or anything else that is not myhostname.com)
I can't exactly explain why that works, because I haven't been able to find a lot of good information about the hosts file in detail, but it does work. Thanks a lot for all of your suggestions.