On 7/15/14 10:47 PM, "Sunhux G" <sunhux@xxxxxxxxx> wrote: >mutt & mailx are MUA (Message User Agent) while >postfix (& I think sendmail) have both MTA and MUA >functions (ie they can act as SMTP servers besides >as MUA). That's mostly correct, but mailx can do what you need in this case, without a local MTA. Here's a modified version of your original mutt example but using mailx with an option to specify an external MTA. $ mailx -s "Test mail" -a /tmp/file.tar.gz -S "smtp=your.relayhost.here" abcde@xxxxxxxxxxxxxx < /tmp/mailmessage.txt > >I guess mailx will require sendmail.cf to be edited as >well: if only we have sort of script that does something >like the telnet & the series of HELO...DATA commands, >that will be wonderful (as I think it doesn't require an >MTA (eg: sendmail & postfix) to be running. Sendmail was the default MTA in RHEL5, Postfix in RHEL 6. Both are reasonably locked down to accept mail only on the loopback as I recall, so not much of a risk, at least from the network, IMO. There are benefits to running a local MTA vs the mailx example as well, namely a MTA will queue and retry if the remote relay is unavailable for some reason. That being said, if you can't or don't want to use a local MTA, the mailx example should work. > >Correct me if my understanding is incorrect. > > >SH > > >On Wed, Jul 16, 2014 at 10:26 AM, Fred Smith ><fredex@xxxxxxxxxxxxxxxxxxxxxx> >wrote: > >> On Wed, Jul 16, 2014 at 10:00:37AM +0800, Sunhux G wrote: >> > Thanks Fred. >> > >> > Sendmail was listed by our audit as a non-secure >> > service. Must sendmail be started or is there any >> > other alternative to send email? >> >> there are other tools to do a similar job, but the only one >> I've used, personally, is sendmail. I think Postfix is another >> one that may be in Centos, though I have no experience with it. >> >> > >> > Think in Windows environment, blat & sendemail >> > doesn't require an equivalent service to work so >> > if there is some other ways of sending email, will >> > be great, say using telnet: >> > >> > (does anyone has a script that could read in the >> > content of a text file, ie line 1-3 below & then >> > perform the steps below) : >> > >> > # telnet SMTP_Relay_IP 25 >> > HELO >> > 501 Syntax: HELO hostname >> > HELO smtp.mypostfixdomain.com >> > 250 hostname.mypostfixdomain.com >> > MAIL FROM:<sender_id@external_domain.com.sg> >> > 250 2.1.0 Ok >> > HELO smtp.mypostfixdomain.com >> > 250 hostname.mypostfixdomain.com >> > MAIL FROM:<sender_id@external_domain.com.sg> >> > 250 2.1.0 Ok >> > RCPT TO:<recipient_id@xxxxxxxxxxxxxxxxxxx> >> > 250 2.1.5 Ok >> > >> > RCPT TO:<root@xxxxxxxxxxxxxxxxxxx> >> > 250 2.1.5 Ok >> > DATA >> > 354 End data with <CR><LF>.<CR><LF> >> > line 1 >> > line 2 >> > line 3 >> > *.* >> > 250 2.0.0 Ok: queued as BAF8A200034 >> > >> > >> > On Wed, Jul 16, 2014 at 12:58 AM, Fred Smith < >> fredex@xxxxxxxxxxxxxxxxxxxxxx> >> > wrote: >> > >> > > On Wed, Jul 16, 2014 at 12:35:19AM +0800, Sunhux G wrote: >> > > > I have got the firewall rule permitted from our RHEL 5.x & >> > > > RHEL 6.x servers to our SMTP relay server (it's running >> > > > RHEL 5.8). >> > > > >> > > > In the past, I recall I have a server that I could just issue >> > > > mutt command below & it will send email out via that >> > > > relay server : >> > > > mutt -s "Test mail" -a /tmp/file.tar.gz abcde@xxxxxxxxxxxxxx < >> > > > /tmp/mailmessage.txt >> > > > >> > > > >> > > > Now all my servers (at another site) can't send email out. >> > > > Did I need to set something at this site's server or is >> > > > there any way that I could specify the SMTP relay server >> > > > in the mutt command? In Windows, blat & sendemail >> > > > allows me to specify the SMTP relay server. >> > > >> > > Assuming you've got sendmail installed, and are using the default >> > > sendmail.cf, >> > > become root, then: >> > > >> > > cd /etc/mail >> > > vi sendmail.cf >> > > >> > > search for a line beginning with "DS", with a comment above it >>reading: >> > > "Smart" relay host (may be null) >> > > and change the line that reads just "DS" to read >>"DSyoursmarthost.foo" >> > > or whatever the FQDN is of your smart relay host. there is NOT a >>space >> > > between the "DS" and the FQDN. >> > > >> > > you'll probably need to restart the sendmail service afterward. >> > > >> > > -- >> > > ---- Fred Smith -- fredex@xxxxxxxxxxxxxxxxxxxxxx >> > > ----------------------------- >> > > Show me your ways, O LORD, teach me your paths; >> > > Guide me in your truth and teach me, >> > > for you are God my Savior, >> > > And my hope is in you all day long. >> > > -------------------------- Psalm 25:4-5 (NIV) >> > > -------------------------------- >> > > >> > > -- >> > > 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 >> >> -- >> ---- Fred Smith -- fredex@xxxxxxxxxxxxxxxxxxxxxx >> ----------------------------- >> "For the word of God is living and active. Sharper than any >>double-edged >> sword, it penetrates even to dividing soul and spirit, joints and >> marrow; >> it judges the thoughts and attitudes of the heart." >> ---------------------------- Hebrews 4:12 (niv) >> ------------------------------ >> >> -- >> 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
