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Old 11-14-2013, 01:25 AM   #1
sachin.davra
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sendmail configuration


Hi,

I wanna configure sendmail in centos 6. I want to enable forward mails to mail relay. how to do it?
 
Old 11-14-2013, 02:29 AM   #2
TenTenths
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Look in your sendmail.cf
Look for the lines:
Code:
# "Smart" relay host (may be null)
DS
Put the hostname of your relay host after the DS
If you are using an IP put it in []
Restart sendmail
 
Old 11-14-2013, 03:15 AM   #3
sachin.davra
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Quote:
Originally Posted by TenTenths View Post
Look in your sendmail.cf
Look for the lines:
Code:
# "Smart" relay host (may be null)
DS
Put the hostname of your relay host after the DS
If you are using an IP put it in []
Restart sendmail
sorry, i could not find this option in sendmail.mc
 
Old 11-14-2013, 03:18 AM   #4
linuxlover.chaitanya
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He was asking you to look into sendmail.cf though I would like to disagree on changing sendmail.cf manually.
In sendmail.mc file, you should have something like this

Code:
define(`SMART_HOST', `[RELAY_HOST_IP]')dnl
You will need to generate a new sendmail.cf using m4 macro and restart the service for changes to take effect.
 
Old 11-14-2013, 03:27 AM   #5
TenTenths
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Quote:
Originally Posted by linuxlover.chaitanya View Post
He was asking you to look into sendmail.cf though I would like to disagree on changing sendmail.cf manually.
I must be "old-school", I've never bothered with sendmail.mc You're prefectly right though, your method does make more sense.
 
Old 11-14-2013, 03:28 AM   #6
sachin.davra
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Quote:
Originally Posted by linuxlover.chaitanya View Post
He was asking you to look into sendmail.cf though I would like to disagree on changing sendmail.cf manually.
In sendmail.mc file, you should have something like this

Code:
define(`SMART_HOST', `[RELAY_HOST_IP]')dnl
You will need to generate a new sendmail.cf using m4 macro and restart the service for changes to take effect.
Thnx for quick reply.

i have done it but still not able to send mail.
 
Old 11-14-2013, 03:31 AM   #7
druuna
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Quote:
Originally Posted by sachin.davra View Post
Thnx for quick reply.

i have done it but still not able to send mail.
As stated in the other thread about this: You need to set up both side to make it work.
 
Old 11-14-2013, 03:34 AM   #8
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have you restarted the sendmail service?

how are you testing it?
 
Old 11-14-2013, 03:38 AM   #9
sachin.davra
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Quote:
Originally Posted by Firerat View Post
have you restarted the sendmail service?

how are you testing it?
Yes i have restarted the service after generating new sendmail.cf

for sending mail using mailx, i have configured sendmail.
installed sendmail and then define('SMART_HOST', '192.168.0.X')dnl
and
dnl # DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl

Please tell me if i have to change something else also.
 
Old 11-14-2013, 04:40 AM   #10
sachin.davra
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Below are the logs if i am trying to send mail using mailx. when i have configured sendmail in one system.
note:- i am using only one system to configure sendmail and sending the mail. mail relay is configured in remote host and i have done the entry in my sendmail.mc
define('SMART_HOST', '192.168.0.125')dnl

Please suggest something to work around this.

Nov 14 16:02:54 GAIDL-5001 sendmail[16907]: rAEAWs7v016907: from=root, size=1099, class=0, nrcpts=1, msgid=<201311141032.rAEAWs7v016907@GAIDL-5001.gai.net>, relay=root@localhost
Nov 14 16:02:54 GAIDL-5001 postfix/smtpd[16908]: connect from localhost[127.0.0.1]
Nov 14 16:02:54 GAIDL-5001 postfix/smtpd[16908]: C97FE1A05AF: client=localhost[127.0.0.1]
Nov 14 16:02:54 GAIDL-5001 postfix/cleanup[16911]: C97FE1A05AF: message-id=<201311141032.rAEAWs7v016907@GAIDL-5001.gai.net>
Nov 14 16:02:54 GAIDL-5001 postfix/qmgr[2614]: C97FE1A05AF: from=<root@GAIDL-5001.gai.net>, size=1578, nrcpt=1 (queue active)
Nov 14 16:02:54 GAIDL-5001 sendmail[16907]: rAEAWs7v016907: to=sachin.davra@gmail.com, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31099, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (Ok: queued as C97FE1A05AF)
Nov 14 16:02:54 GAIDL-5001 postfix/smtpd[16908]: disconnect from localhost[127.0.0.1]
Nov 14 16:02:56 GAIDL-5001 postfix/smtp[16912]: connect to gmail-smtp-in.l.google.com[2a00:1450:4008:c01::1b]:25: Network is unreachable
Nov 14 16:02:56 GAIDL-5001 postfix/smtp[16912]: connect to gmail-smtp-in.l.google.com[74.125.129.27]:25: Connection refused
Nov 14 16:02:56 GAIDL-5001 postfix/smtp[16912]: connect to alt1.gmail-smtp-in.l.google.com[2a00:1450:4008:c01::1b]:25: Network is unreachable
Nov 14 16:02:56 GAIDL-5001 postfix/smtp[16912]: connect to alt1.gmail-smtp-in.l.google.com[74.125.142.27]:25: Connection refused
Nov 14 16:02:56 GAIDL-5001 postfix/smtp[16912]: connect to alt2.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1a]:25: Network is unreachable
Nov 14 16:02:56 GAIDL-5001 postfix/smtp[16912]: C97FE1A05AF: to=<sachin.davra@gmail.com>, relay=none, delay=1.3, delays=0.08/0/1.3/0, dsn=4.4.1, status=deferred (connect to alt2.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1a]:25: Network is unreachable)
 
Old 11-14-2013, 04:54 AM   #11
linuxlover.chaitanya
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Please check the last line in the logs. It says network is unreachable.
 
Old 11-14-2013, 04:54 AM   #12
TenTenths
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Quote:
Originally Posted by sachin.davra View Post
i have done the entry in my sendmail.mc
define('SMART_HOST', '192.168.0.125')dnl
Did you re-build the sendmail.cf? Check in the sendmail.cf file and look for the DS line and ensure it has your relay host details.
 
Old 11-14-2013, 06:01 AM   #13
sachin.davra
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Quote:
Originally Posted by TenTenths View Post
Did you re-build the sendmail.cf? Check in the sendmail.cf file and look for the DS line and ensure it has your relay host details.
i checked my sendmail.cf but DS line has no ip or host name then i write ip address of relay host and restarted the service. but still i am getting same error. may be i am doing some less work to get it worked. if you need some more logs plz tell me i will provide it.
 
Old 11-14-2013, 06:18 AM   #14
TenTenths
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Post the line that begins
Code:
DS
from your sendmail.cf
 
Old 11-14-2013, 07:03 AM   #15
druuna
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I just noticed this:
Quote:
ov 14 16:02:54 GAIDL-5001 sendmail[16907]: rAEAWs7v016907: from=root, size=1099, class=0, nrcpts=1, msgid=<201311141032.rAEAWs7v016907@GAIDL-5001.gai.net>, relay=root@localhost
Nov 14 16:02:54 GAIDL-5001 postfix/smtpd[16908]: connect from localhost[127.0.0.1]
Nov 14 16:02:54 GAIDL-5001 postfix/smtpd[16908]: C97FE1A05AF: client=localhost[127.0.0.1]
.
.
.
Which MTA are you actually using?

I do believe that CentOS 6, like RHEL 6, uses postfix as the default MTA.
 
  


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