specify SMTP relay server in mutt

[Sunhux G]

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 at fcshome.stoneham.ma.us>
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 at external_domain.com.sg>
> > 250 2.1.0 Ok
> > HELO smtp.mypostfixdomain.com
> > 250 hostname.mypostfixdomain.com
> > MAIL FROM:<sender_id at external_domain.com.sg>
> > 250 2.1.0 Ok
> > RCPT TO:<recipient_id at mypostfixdomain.com>
> > 250 2.1.5 Ok
> >
> > RCPT TO:<root at mypostfixdomain.com>
> > 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 at fcshome.stoneham.ma.us>
> > 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 at nixcraft.co.in <
> > > > /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 at fcshome.stoneham.ma.us
> > > -----------------------------
> > >                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)
> > > --------------------------------
> > >
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> --
> ---- Fred Smith -- fredex at fcshome.stoneham.ma.us
> -----------------------------
>    "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)
> ------------------------------
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