Mailx out from the server

[Jie Li]

Good morning:

Can someone share with me how to set the system up to allow email out from the server?

Thanks in advance

[Geoff Wild]

It just works by itself - though, you need DNS working properly...

Depending on internal environment, you may have to configure sendmail:

In /etc/mail/sendmail.cf

Setup a smart relay:

DSyourrelayserver

Masquerade?

DMyourdomain.com


Stop/start sendmail.

Rgds...Geoff

[Luk Vandenbussche]

Add your nailhost in /etc/mail/sendmail.cf

DSyourhost.yourcompany.com

Restart sendmail

[jpcast_real]

Hello,

you do not need to have running the sendmail daemon to send a mail . The easiest way is to use the executable sendmail , it has the same name as the daemon but it is not the same. If you want to use the sendmail daemon you must have a /etc/mail/sendmail.cf configuration file correctly configured and sometimes it is a bit complicated. You will be able to find in docs.hp.com lots of information about how to configure internet services and sendmail too . When you have configured the sendmail.cf file you just need to execute

sendmail -v dkjldfjl@kk.com

Thats all

[Muthukumar_5 · Accepted solution]

We can do with mailx (or mail or sendmail ) service easily as,

-- /etc/nsswitch.conf ---
hosts: dns hosts

-- /etc/resolv.conf --
domain yourdomain.com
nameserver xx.xx.xx.xx
nameserver xx.xx.xx.xx
-----------------------

Check resolvation as,

nslookup hostname.domainname.com
example:
nslookup test.testdom.com

or nsquery hosts test.testdom.com "dns hosts"

It has to be resoled there.

Sending mails:

echo "Test mail on $(date)" | mailx -s "test mail from `hostname`" loginuser@domainname.com

It will send your mails.

[Prashant Zanwar_4]

You have to have relayserver configured in sendmail.cf and also mention the same in host file. This shall let you mail across with correct nsswitch.conf and resolv.conf.

Thanks
Prashant

[Prashant Zanwar_4]

# Relay all non-local mail to the "Smart" relay host (DS) via smtp:#to a smart relay via SMTP just set macro S (DS) to the name of the #
# Relay all non-local mail to the "Smart" relay host (DS) via UUCP: #
# make two chnages to this file. First, set macro S (DS) to the name #
DS

Hope this helps
Prashant

[Jie Li]

Prashant:

I did exactly what you said. It worked.

Thank you. Will it creat any security hole?

[Prashant Zanwar_4]

I am sure what seuciry implementation you have in your company.
I have tightined security in my company, but due to some reasons we have just stopped sendmail daemon, while still I can send mails across. We did not de-configure sendmail.
Hope this helps
Prashant

[Prashant Zanwar_4]

http://www.sendmail.com/support/download/patch_page.shtml

http://www.coker.com.au/~russell/sendmail.html

https://www.sendmail.com/timeout.html

Hope the above urls help you in determining what you expect exactly
Prashant

[Geoff Wild]

There is no security hole from running mailx...as Javier states, you don't need sendmail running at all - unless you need to receive email on the HPUX server.

What we do is:

/sbin/init.d/sendmail stop

modify /etc/rc.config.d/mailsvrs file to not start sendmail

Then in root's cron:

# Make sure any queued mail is delivered, as sendmail isn't a daemon anymore
0,30 * * * * /usr/sbin/sendmail -q

Rgds...Geoff

[Jie Li]

Geoff:

How to modify mailservs file to preven sendmail daemon from start?

Thanks

[Geoff Wild]

Just set:

export SENDMAIL_SERVER=0

Rgds...Geoff