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). 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. 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
