Bug 337

Summary: "unqualified hostname unknown" and "unable to qualify my own domainname"
Product: [Retired] Red Hat Linux Reporter: walt
Component: sendmailAssignee: David Lawrence <dkl>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 5.2   
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 1998-12-10 15:31:02 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description walt 1998-12-08 01:41:35 UTC 
I'm running RedHat 5.2, with libc-5.3.12-28.

I'm having problems with sendmail. I used /bin/mail to
try to send messages to "jari_aalto".
Whenever sendmail processes the queue, it logs messages
like:

Dec  7 20:06:05 orbit sendmail[13764]: My unqualified \
host name (orbit) unknown; sleeping for retry

Dec  7 20:07:05 orbit sendmail[13764]: unable to qualify \
my own domain name (orbit) -- using short name

I'm using the stock sendmail.cf. Other files that might
be of interest are:

/etc/hosts:
127.0.0.1	loopback
0.0.0.0		orbit

/etc/resolv.conf:
domain trytel.com
nameserver 209.167.55.5
nameserver 209.167.55.15
nameserver 207.112.63.4

/etc/nsswitch.conf: (changed lines ONLY)
passwd:     files
shadow:     files
group:      files

hosts:      files dns

I'm using PPP to connect to two ISPs (and plan to add a
third soon). They are "trytel.com" (my primary ISP) and
"wonder.ca". Because I'm connecting to two, I hesitate
to define either one in the $j macro in sendmail.cf
or to specify a smart mail host with DS.

How can I get sendmail to send mail?
Comment 1 Derek Tattersall 1998-12-08 16:46:59 UTC 
I cannot really tell from the information that you provided, but the
IP address for orbit (0.0.0.0) is what is causing your problem.  This
is not a valid IP address for a machine.  You might want to check
with your ISP to verify that you are using a valid address for orbit.