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Old 05-13-2015, 11:00 AM   #1
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Registered: May 2015
Posts: 2

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Sendmail is not working

Hi all,

I am trying to configure sendmail on my OEL 6.5 running on VM.

I did below to set it :

1. # yum install m4 telnet mailx
2. # yum install sendmail sendmail-cf
3. # ps -ef | grep -v grep | grep -i sendmail
root 3805 1 0 05:58 ? 00:00:00 sendmail: accepting connections
smmsp 3815 1 0 05:58 ? 00:00:00 sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue

4. # netstat -an | grep :25 | grep tcp
tcp 0 0* LISTEN

5. vi /etc/mail/

DAEMON_OPTIONS(`Port=smtp,Addr=, Name=MTA')dnl

dnl DAEMON_OPTIONS(`Port=smtp,Addr=, Name=MTA')dnl

6. # m4 /etc/mail/ > /etc/mail/

7. # service sendmail restart

8. # vi /etc/mail/local-host-names

Now if I am sending mail from 1 user (root) to other user (oracle)

$ mail -s "Test mail from root" oracle
Hello this is the test mail

and checking mail log under /var/mail/oracle, its passing successfully.

But when trying to send the same from root user to my company outlook account not gtting any mail.

mail -s "Test mail from root" (trying to send to my outlook account)

Getting below error on /var/log/maillog :

May 13 10:47:47 mydb sendmail[6306]: t4DEllUD006306: from=oracle, size=244, class=0, nrcpts=1, msgid=<>, relay=root@localhost
May 13 10:47:47 mydb sendmail[6307]: t4DEllxo006307: from=<>, size=506, class=0, nrcpts=1, msgid=<>, proto=ESMTP, daemon=MTA, relay=localhost []
May 13 10:47:47 mydb sendmail[6306]: t4DEllUD006306:, ctladdr=oracle (600/601), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30244, relay=[] [], dsn=2.0.0, stat=Sent (t4DEllxo006307 Message accepted for delivery)
May 13 10:47:49 mydb sendmail[6309]: STARTTLS=client,, version=TLSv1/SSLv3, verify=FAIL, cipher=AES256-SHA, bits=256/256
May 13 10:47:50 mydb sendmail[6309]: t4DEllxo006307: to=<>, ctladdr=<> (600/601), delay=00:00:03, xdelay=00:00:03, mailer=esmtp, pri=120506, [], dsn=2.0.0, stat=Sent (1uc8dar1s7-1 Message accepted for delivery)

Please suggest if something I missed out or any other problem

Old 05-13-2015, 03:45 PM   #2
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Registered: Feb 2005
Location: SF Bay Area, CA
Distribution: Gentoo, Red Hat, CentOS
Posts: 3

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It looks to me (from what I see in your post) that everything is working properly on your end. I suspect the issue resides in what is happening with the message at the receiving end. Many mail servers now use SPF records or other domain tools to recognize mail from valid MTAs for a domain. If a sender's server is not validated, it looks a lot like an open relay and the message is dropped into /dev/null. Different mail servers may treat the messages differently, so I would spread my test out to other email accounts on different servers (e.g. Gmail, etc.).
Old 05-14-2015, 05:47 AM   #3
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Registered: May 2015
Posts: 2

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Any clue guys... I am stuck badly into this. any suggestion really appriciate.

Old 05-14-2015, 07:18 PM   #4
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Registered: Jan 2012
Posts: 23

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When a reply is received, at least try to do what is suggested and report back. If it is solved, then mark thread as solved so that others dont have to visit this thread unnecessarily.

Whay happened when you tried sending to other emails? If you have access to a receiving log (ie a server on the web somewhere), then look at the receiving log files and see what happens at the incoming end.


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