on 3-27-2008 12:04 PM Giulio Troccoli spake the following:
I have just installed CentOS 5.1 on my home server and I am trying to set a mail server.
I have diligently followed the instructions on the Wiki - How To on the CentOS website (http://wiki.centos.org/HowTos/postfix). However I cannot send internal email (I haven't yet tried externally).
Do you have any suggestions on what to check? To test it I used two normail user: giulio and federica. I logged in as federica and sent an email to giulio with the mail programme. Is this correct (i.e. using the mail programme)?
There is one thing that I don't quite understand from the instructions. In section 3.1 it's suggested to set
mynetworks = 192.168.0.0/24, 127.0.0.0/8
in the /etc/postfix/main.cf file. My home network however is 192.168.69.0 and actually the IP assigned to any computers in the networks start from 192.168.69.20. So I changed mynetworks to 192.168.69.0/24 and also 192.168.69.19/30 (as my server IP address is actully 192.168.69.25). I don't think this is the cause of my problem anyway, because it didn't work even with the value suggested by the Wiki page.
192.168.69.0/24 should be the proper setting here. 192.168.69.19/30 is not a proper network. Are you absolutely sure that you did every step in the howto?
I used mail to send a test message and it worked fine ( after I read the man page -- I haven't used mail to send a message for 20 years or more!).
There must be other errors in your postfix config.
When you start postfix, does it throw any errors in the logs?