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Old 10-20-2004, 03:13 PM   #1
Registered: Jun 2002
Posts: 411

Rep: Reputation: 30
Postfix / Warnings hostname verification failed: Host not found

i have a postfix mail server installed on Fedora Core 2 (using RPM). My pflogsumm log report shows this message but i don't know what it means / what if any action i should take.

message reject warning detail: none

message hold detail: none

message discard detail: none

smtp delivery failures: none

smtpd (total: 11)
8 hostname fc verification failed: Host not found
1 hostname verifica...
1 hostname verification faile...
1 address not listed for hostname
Old 10-21-2004, 02:07 AM   #2
Registered: Oct 2004
Location: Big River, California, USA
Distribution: Debian
Posts: 48

Rep: Reputation: 15
It looks like your DNS resolution is not working. Could you post the contents of /etc/resolv.conf ? Are you running a name server on the same machine as postfix? Can you resolv other hostnames (can you ping or ?


Bill Jennings
Old 10-21-2004, 03:15 PM   #3
Registered: Jun 2002
Posts: 411

Original Poster
Rep: Reputation: 30
/etc/hosts and missing host.named file

I think you put me ont he right track. There were two problems.

1. Missing the "localhost" in /var/named referenced by named.conf

2. missing "localhost" in my /etc/resolv.conf file

3. before when i would restart the named service, i would get a log entry
Oct 21 14:31:16 testy postfix/local[4106]: warning: host not found: localhost
but now all is well and my name resolution speed has improved immensly.


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