[CentOS] Mail has quit working

> -----Original Message-----
> From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of
> tdukes at palmettoshopper.com
> Sent: Monday, July 23, 2018 9:28 PM
> To: CentOS mailing list
> Subject: Re: [CentOS] Mail has quit working
> 
> 
> 
> 
> -------- Original Message --------
> Subject: Re: [CentOS] Mail has quit working
> From: Nataraj <incoming-centos at rjl.com>
> Date: Mon, July 23, 2018 9:01 pm
> To: centos at centos.org
> 
> On 07/23/2018 03:39 PM, TE Dukes wrote:
> > Hello,
> >
> > Mail has come to an abrupt stop. Running C7, postfix and dovecot. Using
> > Roundcube as the client.
> >
> > Mail stopped working Saturday and I cannot figure was has happened. I
> have
> > not touched this server except to upgrade packages. I believe Roundcube
> was
> > updated maybe a week ago but know I was getting mail since then.
> >
> > Crond is no longer send mail. I checked /var/spool/mail as well as
/Maildir
> > in home directories. Zero byte files.
> >
> > Checked all logs and the only thing I could find was in /var/log/maillog
:
> > warning hostname localhost does not resolve to address 127.0.0.1
> >
> > I corrected that by changing inet_interfaces to localhost from all in
> > postfix.cf
> >
> > When I try to log in with Roundcube, it just times out.
> >
> > I'm stuck!
> >
> > TIA for any suggestions!!
> >
> > _______________________________________________
> > CentOS mailing list
> > CentOS at centos.org
> > https://lists.centos.org/mailman/listinfo/centos
> 
> More information would be helpful to troubleshoot this.  Try sending
> output from:
> 
> postfix status
> 
> mailq
> 
> Try telnetting to your smtp server and sending a message like this from
> the local system:
> substitute a valid user/domain on the mail from line and a valid email
> address in your domain
> on the rcpt to line. Do this, logged onto the mailserver.
> 
> telnet localhost 25
> helo mydomain.com (substitute a valid domain here)
> mail from: <someuser at validdomain.com>
> rcpt to: <youremailaddress at yourdomain.com>
> data
> From: someuser at validdomain.com
> to: youremailaddress at yourdomain.com
> subject: test
> 
> This is a test mesage
> .
> 
> note: blank line between mail headers and body
> 
> end data with line containing only '.'.
> 
> Then check your maillog and send the output to the list.
> 
> 
> Nataraj
> 
> postfix status:
> 
> postfix/postfix-script: the Postfix mail system is running: PID 5936
> 
> mailq: Mail queue is empty
> 
> Did the telnet localhost 25, it answered but not sure I understood you
> what I needed to do.
> 
> Thanks!!

Tried following your instructions and got 227 2.7.0 Error: I can break
rules, too. Goodbye.
Connection closed by foreign host.