[SOLVED] sendmail sending localhost.localdomain

[unix1adm]

So I am getting something strange. Some systems get the correct mail header and some do not. They are configured the same way and use DHCP

I researched and found this article :
https://www.linuxquestions.org/quest...domain-484792/

But this is inconstant in my environment. I have this in my host file on a working system (no modification to sendmail.cf file (default one)

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6

We use dhcp
hostname shows :

farscape.mydomain.com

Mail comes to me like this (as I expect it to)

From: logwatch@farscape.mydomain.com [mailto:logwatch@farscape.mydomain.com]
Sent: Thursday, January 28, 2010 12:24 PM
To: root@farscape.mydomain.com
Subject: Logwatch for farscape.mydomain.com(Linux)

No i have the same file on another system the same way and I get this:
From: root_farscape2 [mailto:root@localhost.localdomain]
Sent: Thursday, January 28, 2010 3:31 PM
To: root@localhost.localdomain
Subject: test

I made the changes to sendmail.cf file and that did not work either.
I then updated the host to add farscape2.mydomain.com along with the sendmail.cf file and it worked on those systems that had an issue. I dont understand why or what is happening.

sendmail.cf

cd /etc/mail
cp /etc/mail/sendmail.cf sendmail.cf.date
vi /etc/mail/sendmail.cf
Search for #Dj$w.Foo.com
Add new line
Dj$w.farscape2.mydomain.com

The one that works has not been modified.

seem strange both systems are the exact same build and cfg.

I am wondering why the default cfg works on 1 system and not on another. (we have several systems that work and several that do not)

The problem I am having too is this is DHCP not fixed IP addr so I cannot use the solution as it is written. Adding the host name and IP in the /etc/host file wont work because of DHCP
Any help would be appreciated.

[unix1adm]

tried this document and got an error

Linux Server How To - How to Install the Sendmail Using Apt-get
m4 sendmail.mc >sendmail.cf
sendmail.mc:10: m4: cannot open `/usr/share/sendmail-cf/m4/cf.m4': No such file or directory

[unix1adm]

So I made some progress. bette rbut still not 100%

I modified /etc/mail/local-host-names and added the server name of

# local-host-names - include all aliases for your machine here.
farscape2

Now I get


From: root_farscape2 [mailto:root@localhost.farscape2.mydomain.com]
Sent: Friday, January 29, 2010 8:55 AM
To: root@localhost.farscape2.mydomain.com
Subject: test2

test

[unix1adm]

hmmm


/usr/lib/sendmail -d0.1 -bt < /dev/null
Version 8.13.8
Compiled with: DNSMAP HESIOD HES_GETMAILHOST LDAPMAP LOG MAP_REGEX
MATCHGECOS MILTER MIME7TO8 MIME8TO7 NAMED_BIND NETINET NETINET6
NETUNIX NEWDB NIS PIPELINING SASLv2 SCANF SOCKETMAP STARTTLS
TCPWRAPPERS USERDB USE_LDAP_INIT

============ SYSTEM IDENTITY (after readcf) ============
(short domain name) $w = localhost
(canonical domain name) $j = $w.farscape2.mydomain.com
(subdomain name) $m = localdomain
(node name) $k = farscape2
================================================== ======

ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)
Enter <ruleset> <address>


Working system...

/usr/lib/sendmail -d0.1 -bt < /dev/null
Version 8.13.8
Compiled with: DNSMAP HESIOD HES_GETMAILHOST LDAPMAP LOG MAP_REGEX
MATCHGECOS MILTER MIME7TO8 MIME8TO7 NAMED_BIND NETINET NETINET6
NETUNIX NEWDB NIS PIPELINING SASLv2 SCANF SOCKETMAP STARTTLS
TCPWRAPPERS USERDB USE_LDAP_INIT

============ SYSTEM IDENTITY (after readcf) ============
(short domain name) $w = farscape
(canonical domain name) $j = farscape.mydomain.com
(subdomain name) $m = mydomain.com
(node name) $k = farscape.mydomain.com
================================================== ======

ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)
Enter <ruleset> <address>


So the question is where is the $w and the $m being picked up from....

[unix1adm]

So I put my sendmail.cf back to defaults and I get this now.
/usr/lib/sendmail -d0.1 -bt < /dev/null
Version 8.13.8
Compiled with: DNSMAP HESIOD HES_GETMAILHOST LDAPMAP LOG MAP_REGEX
MATCHGECOS MILTER MIME7TO8 MIME8TO7 NAMED_BIND NETINET NETINET6
NETUNIX NEWDB NIS PIPELINING SASLv2 SCANF SOCKETMAP STARTTLS
TCPWRAPPERS USERDB USE_LDAP_INIT

============ SYSTEM IDENTITY (after readcf) ============
(short domain name) $w = localhost
(canonical domain name) $j = localhost.localdomain
(subdomain name) $m = localdomain
(node name) $k = farscape2
================================================== ======

ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)
Enter <ruleset> <address>


I did a diff on the sendmail.cf from the working system to the non working system and get no diffrences

[unix1adm]

by the wya my host name is set ok
hostname
farscape2

[unix1adm]

Ok I am not sure really why this worked but I did. I changed my host file to be this.

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
xxx.xxx.xxx.xxx discovery.mydomain.com


Notice the absence of the server name in the 127.x line.
restarted and it works now.

[unix1adm]

well yahoo is blocking my mail from the server. says my isp is on the black list for spam.

So I tried to send the mail to another account. My personal domain. I get this as a bounce back.

This i understand because its trying to bounce the mail back to my server root@localhost.localdomain and thats not valid. But what I dont understand is why is it not just accepting the mail and not trying to send it back.
The original message was received at Wed, 3 Mar 2010 04:02:03 -0500
from centos [127.0.0.1]

----- The following addresses had permanent fatal errors -----
me@mydomain.com
(reason: 550 5.1.0 Sender Refused - Address <root@localhost.localdomain>; - Sending Domain Name Invalid or Non-Existent A or MX Record)
(expanded from: <root@localhost.localdomain>

----- Transcript of session follows -----
... while talking to mx01.register.com.:
>>> MAIL From:<root@localhost.localdomain>; SIZE=9817
<<< 550 5.1.0 Sender Refused - Address <root@localhost.localdomain>; - Sending Domain Name Invalid or Non-Existent A or MX Record
554 5.0.0 Service unavailable

May be I need to "spoof" my system to look like its coming from my domain? Not sure how or if thats the right thing to do.
All i want to do is get logwatch off my system so I dont have to login to review it.

[unix1adm]

got this resolved in case any need this info

/etc/sysconfig
more network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=centos
GATEWAY=192.168.1.1

Looks OK

I modified host file to be
192.168.1.100 centos centos.mydomain.com


I get this:

mailx -v -s "test" root

test



.

Cc:

root... Connecting to [127.0.0.1] via relay...

220 localhost.localdomain ESMTP Sendmail 8.13.8/8.13.8; Wed, 3 Mar 2010 11:36:34 -0500

>>> EHLO centos.mydomain.com

250-localhost.localdomain Hello localhost.localdomain [127.0.0.1], pleased to meet you

250-ENHANCEDSTATUSCODES

250-PIPELINING

250-8BITMIME

250-SIZE

250-DSN

250-ETRN

250-AUTH DIGEST-MD5 CRAM-MD5

250-DELIVERBY

250 HELP

>>> MAIL From:<root@centos.mydomain.com> SIZE=30 AUTH=root@centos.mydomain.com

250 2.1.0 <root@centos.mydomain.com>... Sender ok

>>> RCPT To:<root@centos.mydomain.com>

>>> DATA

250 2.1.5 <root@centos.mydomain.com>... Recipient ok

354 Enter mail, end with "." on a line by itself

>>> .

250 2.0.0 o23GaYFv026440 Message accepted for delivery

root... Sent (o23GaYFv026440 Message accepted for delivery)

Closing connection to [127.0.0.1]

>>> QUIT

221 2.0.0 localhost.localdomain closing connection

[root@centos etc]# mailq

/var/spool/mqueue (1 request)

-----Q-ID----- --Size-- -----Q-Time----- ------------Sender/Recipient-----------

o23GaYFv026440* 6 Wed Mar 3 11:36 <root@centos.mydomain.com>

<root@centos.mydomain.com>

Total requests: 1

so i changed my host file to read

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 centos centos.mydomain.com localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6


hostname
centos

so based on the other document I changed the host like yet again

192.168.1.100 centos.mydomain.com centos


Still the mail gets hung on the server.

This is not dhcp by the way but fixed IP.

i put this in the /etc/aliases file
root: myid@mydomain.com

newaliases
I also did a service sendmail restart