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@xxxxxx> > 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@xxxxxxxxxxxxxxxxx> 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@xxxxxxxxxx > [mailto:redhat-list-bounces@xxxxxxxxxx]On Behalf Of j_70@xxxxxxxxxxx > Sent: Wednesday, February 08, 2006 8:13 AM > To: redhat-list@xxxxxxxxxx > 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. > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
