[NTLUG:Discuss] Postfix Operation

[Sally Welch]

On 8/4/07, Dennis Rice <dennis at dearroz.com> wrote:
> I am attempting to configure Postfix mail server.  I am not able to
> send mail from a remote server, although I can receive it.
>
> At the moment, it is to operate exclusively in my internal network for
> my education.
>
> Configuration:
> FC6
> Firewall disabled
> SELinux disabled
> Postfix configuration (main.cf)
> mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
> mynetworks_style = class     {this has been set to subnet}
> myorigin = $mydomain
> relay_domains =        {blank}
> relayhost =              {blank}
>
> Installed dovecot for pop, ok and works for port 110.
>
> Using chkconfig, postfix is on, did restart and reload.
> Created users.
>
> Had to install telnet_server, ok.
> Can telnet to server in general, but can not telnet to port 25
> (telnet server-IP 25).
>
> Performing nmap, port 25 is open.  Port 110 is open, but 220 (imap) is
> not.
>
> Initially using Thunderbird on another Linux host to test, can
> download a received file, so that part configured ok.  At this time, I
> have set the server name to the IP address, as do not have a dns
> server set up for this level (yet).
>
> I am focusing on the point that I am not able to telnet to port 25.
> An obvious reason why mail can not be sent.  Since nmap says it is
> open, I do not understand why I can not telnet to it.
>
> Can anyone provide insight to what I might be doing wrong.
>
> Appreciate
>
> Dennis
>
> _______________________________________________
> http://www.ntlug.org/mailman/listinfo/discuss
>

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?


Sally