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Thread: MTA log warning: Name or service not known [SOLVED]

  1. #1
    661
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    Default MTA log warning: Name or service not known [SOLVED]

    Greetings:

    Noticing quite a lot of these messages in /var/log/zimbra.log

    Code:
    08:54:07 mail2 postfix/smtpd[2367]: warning: 172.26.14.38: hostname ntbtcaph.corp.mycompany.net verification failed: Name or service not known
    Found this thread: [SOLVED] ERROR LOG: Name or service not known

    But the fix does not appear to apply in my case. Mail is flowing okay. Is this a real problem or can it be safely ignored?

    Configuration requested in the aforementioned thread follows:

    Code:
    zmcontrol -v
    Release 7.2.0_GA_2669.RHEL5_64_20120410001942 RHEL5_64 FOSS edition, Patch 7.2.0_P1.
    
    -------------------------------------------------------------
    cat /etc/hosts
    127.0.0.1		localhost.localdomain localhost
    10.2.26.101	   mail2.mycompany.net mail2
    ::1		localhost6.localdomain6 localhost6
    
    -------------------------------------------------------------
    cat /etc/resolv.conf
    nameserver 172.23.54.30 ; ntdcb.corp.mycompany.net 
    nameserver 172.23.54.31 ; ntdbh.corp.mycompany.net 
    search mycompany.net corp.mycompany.net mycompany.com
    
    -------------------------------------------------------------
    dig mymaildomain.com mx
    ; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.5 <<>> mymaildomain.com mx ;; global options:  printcmd ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2709 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
    
    ;; QUESTION SECTION:
    ;mymaildomain.com.	IN	MX
    
    ;; ANSWER SECTION:
    mymaildomain.com. 3600	IN	MX	10 mail2.mycompany.net.
    
    ;; ADDITIONAL SECTION:
    mail2.mycompany.net. 3600	IN	A	10.2.26.101
    
    ;; Query time: 1 msec
    ;; SERVER: 172.23.54.30#53(172.23.54.30) ;; WHEN: Tue Apr 30 09:23:44 2013 ;; MSG SIZE  rcvd: 96
    -------------------------------------------------------------
    dig mycompany.net any
    ; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.5 <<>> mycompany.net any ;; global options:  printcmd ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 618 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 7, AUTHORITY: 0, ADDITIONAL: 4
    
    ;; QUESTION SECTION:
    ;mycompany.net.			IN	ANY
    
    ;; ANSWER SECTION:
    mycompany.net.		3600	IN	A	172.26.16.0
    mycompany.net.		3600	IN	A	139.60.221.128
    mycompany.net.		3600	IN	NS	ntvdrdcb.corp.mycompany.net.
    mycompany.net.		3600	IN	NS	ntvdrdca.corp.mycompany.net.
    mycompany.net.		3600	IN	NS	ntdca.corp.mycompany.net.
    mycompany.net.		3600	IN	NS	ntdcb.corp.mycompany.net.
    mycompany.net.		3600	IN	SOA	ntdcb.corp.mycompany.net. admin.corp.mycompany.net. 18495 900 600 86400 3600
    
    ;; ADDITIONAL SECTION:
    ntvdrdcb.corp.mycompany.net. 3600 IN	A	172.26.254.9
    ntvdrdca.corp.mycompany.net. 3600 IN	A	172.26.254.7
    ntdca.corp.mycompany.net. 3600	IN	A	172.23.54.31
    ntdcb.corp.mycompany.net. 3600	IN	A	172.23.54.30
    
    ;; Query time: 1 msec
    ;; SERVER: 172.23.54.30#53(172.23.54.30) ;; WHEN: Tue Apr 30 08:47:06 2013 ;; MSG SIZE  rcvd: 261
    
    -------------------------------------------------------------
    host `hostname
    mail2.mycompany.net has address 10.2.26.101
    Thank you for your time and consideration.
    Last edited by 661; 04-30-2013 at 07:26 AM.

  2. #2
    phoenix is online now Zimbra Consultant & Moderator
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    Quote Originally Posted by 661 View Post
    But the fix does not appear to apply in my case.
    According to to information you've posted there is no MX record for your server.

    Configuration requested in the aforementioned thread follows:

    Code:
    zmcontrol -v
    Release 7.2.0_GA_2669.RHEL5_64_20120410001942 RHEL5_64 FOSS edition, Patch 7.2.0_P1.
    
    -------------------------------------------------------------
    cat /etc/hosts
    127.0.0.1		localhost.localdomain localhost
    10.2.26.101	   mail2.mycompany.net mail2
    ::1		localhost6.localdomain6 localhost6
    
    -------------------------------------------------------------
    cat /etc/resolv.conf
    nameserver 172.23.54.30 ; ntdcb.corp.mycompany.net 
    nameserver 172.23.54.31 ; ntdbh.corp.mycompany.net 
    search mycompany.net corp.mycompany.net mycompany.com
    
    -------------------------------------------------------------
    dig mycompany.net mx
    ; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.5 <<>> mycompany.net mx ;; global options:  printcmd ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 22875 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
    
    ;; QUESTION SECTION:
    ;mycompany.net.			IN	MX
    
    ;; AUTHORITY SECTION:
    mycompany.net.		3600	IN	SOA	ntdcb.corp.mycompany.net. admin.corp.mycompany.net. 18495 900 600 86400 3600
    
    ;; Query time: 1 msec
    ;; SERVER: 172.23.54.30#53(172.23.54.30) ;; WHEN: Tue Apr 30 08:46:49 2013 ;; MSG SIZE  rcvd: 85
    
    -------------------------------------------------------------
    dig mycompany.net any
    ; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.5 <<>> mycompany.net any ;; global options:  printcmd ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 618 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 7, AUTHORITY: 0, ADDITIONAL: 4
    
    ;; QUESTION SECTION:
    ;mycompany.net.			IN	ANY
    
    ;; ANSWER SECTION:
    mycompany.net.		3600	IN	A	172.26.16.0
    mycompany.net.		3600	IN	A	139.60.221.128
    mycompany.net.		3600	IN	NS	ntvdrdcb.corp.mycompany.net.
    mycompany.net.		3600	IN	NS	ntvdrdca.corp.mycompany.net.
    mycompany.net.		3600	IN	NS	ntdca.corp.mycompany.net.
    mycompany.net.		3600	IN	NS	ntdcb.corp.mycompany.net.
    mycompany.net.		3600	IN	SOA	ntdcb.corp.mycompany.net. admin.corp.mycompany.net. 18495 900 600 86400 3600
    
    ;; ADDITIONAL SECTION:
    ntvdrdcb.corp.mycompany.net. 3600 IN	A	172.26.254.9
    ntvdrdca.corp.mycompany.net. 3600 IN	A	172.26.254.7
    ntdca.corp.mycompany.net. 3600	IN	A	172.23.54.31
    ntdcb.corp.mycompany.net. 3600	IN	A	172.23.54.30
    
    ;; Query time: 1 msec
    ;; SERVER: 172.23.54.30#53(172.23.54.30) ;; WHEN: Tue Apr 30 08:47:06 2013 ;; MSG SIZE  rcvd: 261
    
    -------------------------------------------------------------
    host `hostname
    mail2.mycompany.net has address 10.2.26.101
    Thank you for your time and consideration.[/QUOTE]
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    661
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    Default

    My apologies. I interpreted the info request too literally. Corrected my OP.

  4. #4
    661
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    Issue resolved. Found a vestigial PTR record in our DNS causing a conflict. Carry on.

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