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Thread: mx record resolution issue with Ubuntu 10.04 LTS

  1. #1
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    Default mx record resolution issue with Ubuntu 10.04 LTS

    Hello:

    I have spent a bit of time looking for a thread with the answer to this question, and I have gone through the documentation. FYI, I have successfully installed zimbra on several servers and have a fully functional server in our server room, and I have not seen this particular problem before. However, since our 'server room' is a fire-hazard, not to mention that our 'servers' are made of spare parts, I've been tasked with creating a mail server on a leased host (it's a virtual host).

    The virtual host is located at mediatemple.net and is a minimal install. It is not hosting anything but zimbra (sendmail, postfix, and mysql aren't installed.)

    So, the short version: the installation script can't resolve my MX record (not my actual domain name).
    Code:
    DNS ERROR resolving MX for mail2.hamster.com
    It is suggested that the domain name have an MX record configured in DNS
    Change domain name? [Yes]
    I suspect that the problem is that I'm trying to make a second mail server named 'mail2' so I can test it before switching 'mail' off, but I'm unsure. BTW, the MX and A records were edited a little over 24 hours ago, so I'm assuming that it isn't a DNS server propagation issue. The other uncontrolled variable is my hosting provider, which is media temple. The server is a virtual server, and the OS is a canned installation of Ubuntu 10.04 LTS provided by them, which may or may not be particularly standard. I have updated apt-get and installed the prerequisites that the install script warns about.

    I know that the installer needs to be able to resolve my host name, but it isn't. In searching through the forums, I've compiled a list of info that I think will be helpful (actual names and IP addresses slightly mangled -- if actual names are needed, please let me know).

    I even tried ignoring the MX record lookup errror... of course the zimbra installation doesn't work, but I figured it was worth a try.

    Thanks in advance for any help. Once I figure this out, I'll write up an entry in the wiki -- I'm sure I'm not the only person to see this issue. Further, I'm a regular contributor to Media Temple's wiki, and I'll write up a full article there on how to install Zimbra on their particular Ubuntu install.

    Regards,
    Joe Bond

    ______________________________
    Begin troubleshooting info:

    I think I have the right installer:
    Code:
    zcs-7.0.1_GA_3105.UBUNTU10_64.20110304205444.tgz
    I believe that the A record and MX record matches the hosts IP address and hostname. Here is the output of the commands I used to troubleshoot.

    my hostname:
    Code:
    # echo `hostname`
    mail2.hamster.com
    contents of /etc/hosts
    Code:
    # cat /etc/hosts
    127.0.0.1 localhost.localdomain localhost
    # Auto-generated hostname. Please do not remove this comment.
    99.99.148.227 mail2.hamster.com mail2
    Contents of my /etc/resolv.conf (I added the 8.8.8.8 server, which is google's public DNS server)
    Code:
    # cat /etc/resolv.conf
    nameserver 8.8.8.8
    nameserver 70.32.65.21
    nameserver 99.99.128.22
    Output of ifconfig (matches the IP address in the hosts file)
    Code:
    # ifconfig
    venet0:0  Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
              inet addr:99.99.148.227  P-t-P:99.99.148.227  Bcast:0.0.0.0  Mask:255.255.255.255
              UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
    Output of dig (the dig is run on the actual server upon which I'm trying to install Zimbra, again the IP address and hostname match)
    Code:
    # dig mail2.hamster.com
    ;; QUESTION SECTION:
    ;mail2.hamster.com.                IN      A
    
    ;; ANSWER SECTION:
    mail2.hamster.com. 300     IN      A       99.99.148.227
    Output of dig with the mx option (note that the list includes my old email server, which is still running.)
    Code:
    # dig hamster.com mx
    
    ; <<>> DiG 9.7.0-P1 <<>> hamster.com mx
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5582
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
    
    ;; QUESTION SECTION:
    ;hamster.com.              IN      MX
    
    ;; ANSWER SECTION:
    hamster.com.       236     IN      MX      10 mail.hamster.com.
    hamster.com.       236     IN      MX      5 mail2.hamster.com.
    Just for kicks, the output of nslookup
    Code:
    # nslookup mail2.hamster.com
    Server:         8.8.8.8
    Address:        8.8.8.8#53
    
    Non-authoritative answer:
    Name:   mail2.hamster.com
    Address: 99.99.148.227
    And, nslookup with the mx option turned on
    Code:
    # nslookup
    > set type=mx
    > hamster.com
    Server:         8.8.8.8
    Address:        8.8.8.8#53
    
    Non-authoritative answer:
    hamster.com        mail exchanger = 10 mail.hamster.com.
    hamster.com        mail exchanger = 5 mail2.hamster.com.
    And, finally, the installer log, up to the point where the mx record lookup fails:
    Code:
    Wed Apr  6 10:04:58 2011 Operations logged to /tmp/zmsetup.04062011-100458.log
    Wed Apr  6 10:04:58 2011 Installing LDAP configuration database...
    Wed Apr  6 10:04:58 2011 done.
    Wed Apr  6 10:04:58 2011 *** Running as zimbra user: /opt/zimbra/libexec/zmldapschema 2>/dev/null
    Looking for LDAP installation...succeeded
    Installing core schema...
    Installing cosine schema...
    Installing inetOrgPerson schema...
    Installing zimbra schema...
    Installing amavis schema...
    Installing dynlist schema...
    Wed Apr  6 10:04:59 2011 Getting installed packages
    Wed Apr  6 10:04:59 2011 checking isEnabled zimbra-core
    Wed Apr  6 10:04:59 2011 zimbra-core not in enabled cache
    Wed Apr  6 10:04:59 2011 enabled packages 
    Wed Apr  6 10:04:59 2011 Newinstall enabling all installed packages
    Wed Apr  6 10:04:59 2011 Enabling zimbra-core
    Wed Apr  6 10:04:59 2011 Enabling zimbra-ldap
    Wed Apr  6 10:04:59 2011 Enabling zimbra-store
    Wed Apr  6 10:04:59 2011 Enabling zimbra-mta
    Wed Apr  6 10:04:59 2011 Enabling zimbra-snmp
    Wed Apr  6 10:04:59 2011 Enabling zimbra-logger
    Wed Apr  6 10:04:59 2011 Enabling zimbra-apache
    Wed Apr  6 10:04:59 2011 Enabling zimbra-spell
    Wed Apr  6 10:04:59 2011 Setting defaults...
    Wed Apr  6 10:04:59 2011 Setting local config zimbra_java_home to /opt/zimbra/java
    Wed Apr  6 10:04:59 2011 *** Running as zimbra user: /opt/zimbra/bin/zmlocalconfig -f -e zimbra_java_home='/opt/zimbra/java' 2> /dev/null
    Wed Apr  6 10:05:01 2011 checking isEnabled zimbra-cluster
    Wed Apr  6 10:05:01 2011 zimbra-cluster not in enabled cache
    Wed Apr  6 10:05:01 2011 enabled packages zimbra-logger zimbra-store zimbra-mta zimbra-core zimbra-apache zimbra-snmp zimbra-ldap zimbra-spell
    Wed Apr  6 10:05:01 2011 Newinstall enabling all installed packages
    Wed Apr  6 10:05:01 2011 Enabling zimbra-core
    Wed Apr  6 10:05:01 2011 Enabling zimbra-ldap
    Wed Apr  6 10:05:01 2011 Enabling zimbra-store
    Wed Apr  6 10:05:01 2011 Enabling zimbra-mta
    Wed Apr  6 10:05:01 2011 Enabling zimbra-snmp
    Wed Apr  6 10:05:01 2011 Enabling zimbra-logger
    Wed Apr  6 10:05:01 2011 Enabling zimbra-apache
    Wed Apr  6 10:05:01 2011 Enabling zimbra-spell
    Wed Apr  6 10:05:01 2011 checking isEnabled zimbra-store
    Wed Apr  6 10:05:01 2011 zimbra-store is enabled
    Wed Apr  6 10:05:04 2011 checking isEnabled zimbra-ldap
    Wed Apr  6 10:05:04 2011 zimbra-ldap is enabled
    Wed Apr  6 10:05:05 2011 checking isEnabled zimbra-store
    Wed Apr  6 10:05:05 2011 zimbra-store is enabled
    Wed Apr  6 10:05:05 2011 Local timezone detected as PDT
    Wed Apr  6 10:05:05 2011 Default Olson timezone name America/Los_Angeles
    Wed Apr  6 10:05:05 2011 checking isEnabled zimbra-store
    Wed Apr  6 10:05:05 2011 zimbra-store is enabled
    Wed Apr  6 10:05:05 2011 checking isEnabled zimbra-mta
    Wed Apr  6 10:05:05 2011 zimbra-mta is enabled
    Wed Apr  6 10:05:05 2011 
    
    DNS ERROR resolving MX for mail2.hamster.com
    Wed Apr  6 10:05:05 2011 It is suggested that the domain name have an MX record configured in DNS
    Wed Apr  6 10:29:07 2011 
    
    DNS ERROR resolving MX for mail2.hamster.com
    Wed Apr  6 10:29:07 2011 It is suggested that the domain name have an MX record configured in DNS

  2. #2
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    Default

    Hmmm... I must have committed a grave faux pas or maybe all the people who know what's what got jobs.

    On to other email products.

    Cheers.

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