[NTLUG:Discuss] Postfix

[David Stanaway]

Dennis Rice wrote:
> In the continuing saga, the problem was solved....
> ------------------
>  > Hi Dennis,
>  > >
>  > > If there is no firewall, I have to think that Postfix isn't actually
>  > > running, since the port isn't open.
>  > > Does 'ps -ef |grep postfix' prove that it's running?  Does the mail
>  > > log indicate that all's well?
>  > >
> 
> Or where is it bound?
> sudo netstat -pln | grep postfix
> 
> see if it is bound to 127.0.0.1 or 0.0.0.0 or your IP.
> sorry, coming in late and drinking tonigth.
> 220 is not imap.  143 is imap. 993 is imap/ssl.  postfix is an MTA, so
> 25 only.  As far as sending mail, you will need to configure the relays
> hosts (not recommended), or use authentication credentials to allow
> relay (recommended).  I use sendmail and exim, so I am no real help with
> the configs...  so I guess I can shut up now.
> 
> I'm confused.  If nmap says 25 is open, but you can't telnet there,
> problem.  nmap will do a connnect by default.  Maybe add in a -sV and
> see what the results are (assuming a recent version of nmap).
> 
> ----------------
> 
> The solution was to add the local IP address to the inet_interfaces 
> address.  For some reason, the Postfix does not pick up on the 
> interface address.  Normal configuration (recommended)is:
> inet_interfaces = $myhostname, localhost
> I had to change this to:
> inet_interfaces = $myhostname, localhost, 192.168.1.71
> 
> After adding the above, I was able to telnet to the server port 25. 
> If anyone has any comprehension to why, I am sure many would like to 
> understand, including the people back at Postfix.  Does anyone know of 
> a variable that returns an interface's IP address?

Maybe when you installed the system you left the ethernet interfaces
unconfigured, and the hostname was aliased to localhost in /etc/hosts

host `hostname`
should show the lan IP of the system.