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I'm still on my second day of trying to figure this thing out, but I cant for the life of me find any answers.
I want to use my mchine as a mail server. I have a DSL line with a fixed IP and a domain name hosted on my ISP's DNS servers pointing to that IP. This setup has worked fine under windows, but I really want to give this a go.
Sendmail appears to be installed by default, so that's ok. However, I cant find any information anywhere about what I am supposed to do to make it work or configure it.
After hours of searching, I find a link saying the easiest way to configure it is to use webmin. I have since downloaded and installed webmin and I have it up and running.
Still, all the settings appear correct but I simply cannot get a mail client on my network (the linux box is 192.168.0.3 and the client is 192.168.0.4) to see the server. All I get is the trusty 'server has unexpectedly terminated the connection' message.
Now, I have looked and looked, but I cant see any reason for this. By a sheer fluke I managed to turn on my pop3 port by using webmin and looking in Extended Internet Services and ticking a box next to pop3.
I have no idea why this worked, and I have no idea of how to do the same for the SMTP server (its not in the list).
Can anyone help me out with this, its really driving me nuts.
Redhat was notorious for going out of their way to make their distribution as "secure" as possible -- to the detriment of the average person's ability to get things working. Most of the problems I ran into when I used Redhat were from their having obscure things disabled, which caused other things not to work.
The below document tells how to get this up and running. Read the whole document, but especially the section that begins:
The default sendmail.cf does not allow sendmail to accept network connections from any host other than the local computer.