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RE: no mail from / for root



Thanks for the replies to this. My curiosity is that I have two RHEL4 machines, one where root is sending mail, one where it is not. As far as I can tell (ps -ef | grep sendmail & ps -ef | grep postfix) neither of these daemons are running on either machine. So, what is sending the mail?


 -------------- Original message ----------------------
From: "Wayne Pinette" <Wpinette tru ca>
> Also, I believe that sendmail's default configuration in RHEL 4 is to
> only listen  to localhost anyway.  This means
> that even if it is running (with just default) outside users still
> won't connect to the smtp port, just localhost users.
> 
> In addition, you can also fire up iptables to block port 25 as well,
> just to make sure.
> If you want email to flow from your machine, though, sendmail (or
> postfix) does need to be running.
> 
> Wayner
> 
> 
> >>> Job Cacka <job ccbmail ccbox com> 02/08/06 8:33 am >>>
> 	Because sendmail is disabled, and no other mailer is enabled,
> this is why
> you are not getting the root mail. What we do to protect sendmail is
> we
> block port 25 access to all servers except for the email servers. This
> means
> that the port is not available on that machine except locally, in our
> own
> WAN. We use an external hardware device to accomplish this, which is
> the
> only way to create a true firewall. Obviously keeping sendmail off is
> the
> best security, but then so is using scissors on your CAT 5
> connections.
> 	I would guess that if you are keeping sendmail up2date with the
> RHN then
> you have nothing to worry about. Unless you are NSA, FBI, CIA, some
> company
> with secrets worth knowing, or good bandwidth that hackers/spammers
> might
> want to exploit.
> 	There are other mail servers in RHES 4. Dovecot comes to mind
> and I think
> that Courier is also available.
> 
> Job Cacka
> 
> -----Original Message-----
> From: redhat-list-bounces redhat com 
> [mailto:redhat-list-bounces redhat com]On Behalf Of j_70 comcast net 
> Sent: Wednesday, February 08, 2006 8:13 AM
> To: redhat-list redhat com 
> Subject: no mail from / for root
> 
> 
> I have an RHES4 mahine which does not send any mail to or from root.
> For
> example, the result of a cron job is not sent. I thought this service
> was
> enabled by default. If not, which services is it. I have read that
> sendmail
> has some security issues and since this machine will not be mailing
> the
> outside world, I did not want to start or configure it. Not sure where
> to
> start looking. TIA.
> 
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